Glossary — Expanded Edition

This glossary is also searchable.

The complete Alpha Academy dictionary — 852 market terms defined in the plainest English we could write. This expanded edition takes the original 519-term glossary and adds over 330 more: order flow, gamma and dealer positioning, volatility, advanced options structures, trader taxes, market internals, and the slang you will actually hear on a trading desk — each one defined honestly, with the risk stated where there is risk.

How to Search This Glossary

This glossary is fully searchable. Open the PDF and use find — Ctrl+F on Windows or Cmd+F on Mac — type the word, and jump straight to it. On a phone or tablet, use the search option in your PDF app. Terms are organized A–Z if you prefer to browse.

A

Abandoned Baby — A rare three-candle reversal pattern: a strong candle, a doji (a candle that opens and closes at nearly the same price) that gaps away, then a strong candle back the other way. It can hint a trend is exhausted, but like every pattern it is a clue, not a promise.
Account — The place at a brokerage firm where your money and investments are held. You deposit cash into it, and all your buying and selling happens through it.
Accredited Investor — A person the government allows to buy certain riskier, private investments because they meet income or wealth requirements set by regulators. Most everyday stocks and funds are open to everyone, accredited or not.
Accrued Interest — Interest that has built up on a bond since its last payment date. When you buy a bond between payment dates, you pay the seller this amount on top of the price, and you get it back at the next payment.
Accumulation/Distribution Line — An indicator that tracks whether money is flowing into a stock (accumulation, quiet buying) or out of it (distribution, quiet selling) using price and volume together. Traders watch whether it confirms the price trend or disagrees with it.
Acquisition — When one company buys another company. Example: if a giant company buys a small one, the small company's stock usually stops trading on its own.
Actively Managed Fund — A pooled investment where a professional manager hand-picks what to buy and sell, trying to beat the overall market. These usually charge higher fees than funds that simply copy an index.
Adjusted Close — A stock's closing price after it has been corrected for things like dividends and stock splits. It gives a truer picture of the stock's real return over time.
Advance/Decline Line — A market breadth line that adds up, day by day, how many stocks rose minus how many fell. If the market index is rising but this line is falling, fewer and fewer stocks are doing the lifting — a warning sign, not a signal by itself.

ADX (Average Directional Index) — An indicator scored 0 to 100 that measures how strong a trend is, not which direction it goes. Many traders read above 25 as a real trend and below 20 as a choppy, directionless market.
After-Hours Trading — Buying and selling stocks outside the regular market session of 9:30 AM to 4:00 PM Eastern Time. Prices can move more wildly then because fewer people are trading.
After-Tax Return — What you actually keep from an investment after taxes are paid. A gain that looks bigger before taxes can end up smaller than a "lower" gain once the tax bill is counted.
Algorithm — A set of step-by-step rules a computer follows to make decisions, such as when to buy or sell. Many large firms use algorithms to place trades automatically in a fraction of a second.
All-or-None Order — An order to buy or sell that must be filled completely, in full, or not at all. If the full amount is not available, the trade simply does not happen.
Alpha — A measure of how much an investment beat a comparison index, such as the S&P 500. If a fund returned 12% and its index returned 10%, the extra 2% is its alpha.
Alpha Decay — The way a trading edge slowly stops working as more people discover and copy it. Any strategy that once printed money tends to fade — one more reason backtest results never guarantee future results.
American Depositary Receipt (ADR) — A certificate traded on a US exchange that represents shares of a foreign company. It lets Americans invest in overseas companies without opening a foreign account.
American-Style Option — An option contract the owner can use (exercise) at any time before it expires, not just on the last day. Most options on individual US stocks work this way.
Amortization — Spreading a cost or a debt payment out over time in equal pieces. A loan is amortized when each monthly payment chips away at both the interest and the amount borrowed until it reaches zero.
Analyst — A professional who studies companies, their finances, and their industries, then publishes opinions on whether a stock looks attractive. Their views are opinions, not guarantees.
Anchored VWAP (AVWAP) — The volume weighted average price measured from one starting point you choose, such as an earnings day or a big high or low, instead of from the start of the day. Traders use it to judge who has been in control since that important moment.
Annual Meeting — A yearly gathering where a company's leaders report to shareholders and shareholders vote on things like board members. Public companies are required to hold one.
Annual Report — A detailed yearly document a company publishes about its business and finances, including its audited financial statements. The official version filed with regulators is called a 10-K.
Annualized Return — A return restated as if it happened evenly over one full year, so different time periods can be compared fairly. A 5% gain in six months is roughly a 10% annualized return — but markets rarely repeat on schedule.
Annualized Volatility — How much a price typically swings, restated as a yearly percentage. Implied volatility on options is quoted this way: 20% annualized means about 5.8% of expected movement over the next 30 days.
Annuity — A contract, usually sold by an insurance company, that pays you a series of payments over time in exchange for money you pay in. People often use annuities for retirement income.
Appreciation — An increase in the value of an investment. If you buy a stock at $40 and it rises to $55, that $15 rise is appreciation.

Arbitrage — Buying something in one place and selling it at the same moment in another place for a slightly higher price, pocketing the tiny difference. Computers do most of this now because the gaps last only instants.
Ascending Triangle — A chart pattern with a flat ceiling (resistance) and rising lows pushing up underneath it, like a crowd pressing harder and harder against a door. It often breaks upward, but "often" is not "always."
Asian Session — The trading hours centered on Tokyo, roughly the evening and overnight hours in the US (about 7 PM to 4 AM Eastern). Forex and futures trade then, usually more quietly than the US session.
Ask — Short for ask price: the lowest price a seller is currently willing to accept for a stock or contract. It is the price you will usually pay when you buy right away.
Ask Price — The lowest price any seller is offering at this moment. Example: if the ask price is $50.05, that is the cheapest you can buy a share for right now.
Ask Size — The number of shares or contracts sellers are offering at the ask price. It shows how much is available to buy at that cheapest offered price.
Asset — Anything of value that you own, such as cash, a house, or shares of stock. In trading, your assets are the money and investments in your account.
Asset Allocation — How you divide your money among different kinds of investments, like stocks, bonds, and cash. Example: 70% stocks and 30% bonds is one simple allocation.
Asset Class — A group of similar investments, such as stocks, bonds, real estate, or commodities like gold and oil. Different classes tend to behave differently in the same economy.
Assignment — When the seller of an option is chosen to fulfill the contract — for example, being required to sell 100 shares at the agreed price because the buyer used their option. Sellers cannot control when this happens.
At-the-Close Order — An order that is carried out as close as possible to the market's closing price at the end of the day. Traders use it when they want the day's final price.
At-the-Money — Describes an option whose strike price (the set price in the contract) is equal, or very close, to the current price of the stock. A $50 call option on a $50 stock is at-the-money.
At-the-Open Order — An order that is carried out as close as possible to the market's opening price at the start of the day. If it cannot be filled at the open, it is usually cancelled.
Auction Market — A market where buyers and sellers compete openly with bids and offers and the trade happens where they meet, the way the stock exchanges work. The price is simply wherever the highest buyer and lowest seller agree.
Authorized Participant — A large firm allowed to create or destroy shares of an ETF by trading baskets of the underlying stocks with the fund company. This behind-the-scenes work is what keeps an ETF's price close to the value of what it holds.
Authorized Shares — The maximum number of shares a company is legally allowed to issue, set in its founding paperwork. It is bigger than the shares actually out in the market, because the company keeps room to issue more later.
Automatic Exercise — At expiration, an option that is in-the-money (worth using) by even a small amount is usually exercised automatically by the clearing system unless you instruct otherwise. Check your broker's exact rule so you are never surprised.

Average Daily Range (ADR) — The average distance between a stock's high and low each day over a recent period, usually about 14 days. It tells you how much room a stock normally has to move in a day, which helps with realistic targets and stops.
Average Daily Volume — The average number of shares of a stock that change hands on a typical trading day. High volume means lots of people are trading it, so buying and selling is usually easier.
Average True Range — A measuring tool (often shortened to ATR) that shows how much a stock's price typically moves in a day, including gaps. Traders use it to judge how jumpy a stock is and where to place stop losses.
Averaging Down — Buying more shares of something after its price has fallen, which lowers your average cost per share. It can help if the price recovers, but it also puts more money into a losing position, so it is risky.
Averaging Up — Buying more shares of something after its price has risen, which raises your average cost per share. Traders do this when a winning position keeps proving itself.

B

Backtesting — Testing a trading strategy on old price data to see how it would have performed in the past. Good past results do not guarantee future profits.
Bag Holder — Slang for someone still holding an investment that has crashed in value, usually because they could not bring themselves to sell. It is the end result of buying hype with no exit plan.
Balance Sheet — A financial snapshot of a company at one moment, listing what it owns (assets), what it owes (liabilities), and what is left over for owners. It answers the question: what is this company worth on paper right now?
Bankruptcy — The legal process a company goes through when it cannot pay its debts. Shareholders are last in line to get anything back, and the stock usually ends up worthless or nearly so.
Bar Chart — A type of price chart where each bar shows a period's opening price, highest price, lowest price, and closing price. It packs the same information as a candlestick into simple lines.
Basis — In futures, the gap between the futures price and the current cash (spot) price of the same thing. The basis shrinks toward zero as the contract reaches expiration.
Basis Point — One one-hundredth of a percent, written as 0.01%. If the Federal Reserve raises rates by 25 basis points, that means a 0.25% increase.
Basis Trade — A professional strategy that buys the cash version of something and sells the futures version (or the reverse) to profit from the small gap between them closing. It uses heavy borrowing and is not a beginner trade — small gaps can still produce big losses when leveraged.
Bear Call Spread — An options strategy using two call contracts: you sell one call and buy a higher-priced call for protection, collecting money up front. It profits if the stock stays flat or falls, and both profit and loss are capped.
Bear Flag — A chart pattern where price drops sharply (the pole), then drifts slowly upward in a narrow channel (the flag), then often breaks down again. It is a pause inside a downtrend, not proof the fall is over.
Bear Market — A long period when the overall market has fallen 20% or more from a recent high. Bear markets are painful but a normal part of investing history.

Bear Market Rally — A sharp rise in prices inside a longer bear market that fades and gives way to new lows. These rallies are some of the fastest moves in markets, which is exactly why they trap buyers who mistake them for the bottom.
Bear Put Spread — An options strategy using two put contracts: you buy one put and sell a lower-priced put to reduce the cost. It profits if the stock falls, and both profit and loss are capped.
Bear Trap — A false drop below a support level that pulls in sellers and short sellers, then snaps back up and squeezes them out at a loss. It is why traders wait for confirmation instead of jumping at the first break.
Bearish — Believing a price will go down. A bearish trader expects falling prices, just as a bear swipes its paws downward.
Bearish Engulfing — A two-candle pattern at the top of an up-move: a green candle followed by a bigger red candle whose body completely covers the first. It suggests sellers took control, but it needs confirmation from what happens next.
Benchmark — A standard used to compare performance against, usually an index like the S&P 500. If your account grew faster than your benchmark, you beat the market; slower, and you lagged it.
Beta — A number that measures how much a stock tends to swing compared with the overall market. A beta of 1 moves about with the market, 2 means roughly double the swings, and 0.5 means about half.
Beta Weighting — A way of converting all your different positions into one common measuring stick, usually "how much would I gain or lose if the S&P 500 moved 1%." Brokers offer it so you can see your true overall market exposure in one number.
Bid — Short for bid price: the highest price a buyer is currently willing to pay for a stock or contract. It is the price you will usually get when you sell right away.
Bid Price — The highest price any buyer is offering at this moment. Example: if the bid price is $50.00, that is the most you can sell a share for right now.
Bid Size — The number of shares or contracts buyers want to purchase at the bid price. It shows how much demand is waiting at that highest offered price.
Bid-Ask Spread — The gap between the bid price (what buyers offer) and the ask price (what sellers want). A wider gap means trading costs you more, because you buy at the higher price and sell at the lower one.
Black Swan — A shocking event nobody had priced in — a crash, a crisis, a sudden collapse — that moves markets violently. By definition you cannot predict one; the only defense is position sizing and not risking everything on one idea.
Block Trade — A single very large trade, usually at least 10,000 shares, often made by a big institution rather than an individual. Block trades are often arranged privately to avoid disturbing the market price.
Blow-Off Top — The final, frantic burst of buying at the end of a long rise: price rockets up on huge volume, then reverses hard. It looks like pure excitement at the time and pure exhaustion afterward.
Blue-Chip Stock — A share of a large, well-known, financially strong company with a long history, like the biggest household-name businesses. Blue chips are considered steadier than most stocks, though they can still fall.
Bollinger Bands — Lines drawn on a chart above and below a moving average, usually set two standard deviations (a measure of spread) away. The bands widen when a stock moves wildly and squeeze tight when it is calm, helping traders spot unusual moves.

Bollinger Squeeze — When Bollinger Bands pinch in unusually tight around price, showing that movement has gone very quiet. Quiet periods tend to be followed by big moves — but the squeeze itself does not tell you which direction.
Bond — A loan you make to a company or government: you hand over money, they pay you interest on a schedule, and they promise to return your money on a set date. Bonds are generally calmer than stocks but usually grow more slowly.
Bond Ladder — Owning several bonds (or bond funds with set maturity targets) that come due in different years, like rungs on a ladder. As each one matures you reinvest at the far end, which smooths out the risk of interest rates moving against you.
Bond Yield — The return a bond pays, expressed as a percentage of its price. When a bond's price falls, its yield rises, and when its price rises, its yield falls.
Book Value — What a company would be worth on paper if it sold everything it owns and paid off everything it owes. Book value per share divides that number by the number of shares.
Book Value Per Share — What a company would theoretically be worth per share if it sold everything it owns, paid every debt, and split what was left among shareholders. It is an accounting number, not a promise — many stocks trade far above or below it for years.
Bottom Fishing — Trying to buy a stock that has fallen hard, guessing the worst is over. Sometimes it works; often the stock keeps falling, which is why traders joke about catching a falling knife.
Bounce — A short rise in price after a drop. A bounce is not the same as a recovery — falling stocks bounce many times on the way down.
Bracket Order — An order that bundles three instructions: buy (or sell), plus a profit-taking price and a stop-loss price attached. Whichever exit price is hit first closes the trade automatically.
Breadth — A measure of how many stocks are joining in a market move: how many are rising versus falling. A rally carried by only a handful of giant stocks has weak breadth and is more fragile than it looks.
Break-Even Point — The price at which a trade makes no profit and no loss. For a bought call option, it is the strike price plus the premium paid; for a bought put, it is the strike price minus the premium.
Breakout — When a price pushes through a level where it kept stopping and turning around before, often with heavy trading. Traders watch breakouts because a strong move sometimes follows.
Broker — A licensed company (or its representative) that carries out buy and sell orders for customers in exchange for fees. Your brokerage account is held with a broker.
Bubble — A period when prices rise far beyond what the underlying business or asset can justify, fueled by excitement and the fear of missing out. Bubbles always look obvious afterward and feel unstoppable while you are inside one.
Bull Call Spread — An options strategy using two call contracts: you buy one call and sell a higher-priced call to lower the cost. It profits if the stock rises, and both profit and loss are capped.
Bull Flag — A chart pattern where price rises sharply (the pole), then drifts slowly downward in a narrow channel (the flag), then often breaks upward again. It is a rest inside an uptrend — "often," never "guaranteed."
Bull Market — A long period when the overall market has risen 20% or more from a recent low. Bull markets reward patience but eventually always end.

Bull Put Spread — An options strategy using two put contracts: you sell one put and buy a lower-priced put for protection, collecting money up front. It profits if the stock stays flat or rises, and both profit and loss are capped.
Bull Trap — A false break above a resistance level that pulls in buyers, then reverses down and traps them. The mirror image of a bear trap, and the reason breakouts are confirmed, not assumed.
Bullish — Believing a price will go up. A bullish trader expects rising prices, just as a bull thrusts its horns upward.
Bullish Engulfing — A two-candle pattern at the bottom of a down-move: a red candle followed by a bigger green candle whose body completely covers the first. It suggests buyers stepped in, but one pattern never confirms a turn by itself.
Burn Rate — The speed at which a company that is losing money spends its cash, usually quoted per month. Divide the cash in the bank by the burn rate and you get roughly how long the company can survive before it must raise more money or cut costs.
Business Cycle — The repeating pattern of the economy growing for a while, then slowing or shrinking, then recovering. Different kinds of companies tend to do well at different stages of the cycle.
Butterfly Spread — An options strategy using three strikes in the same expiration, built to profit if price pins near the middle strike at expiration. Risk is limited to what you paid, but the winning zone is narrow — price has to land close to the middle.
Buy and Hold — A strategy of buying an investment and keeping it for years through ups and downs, rather than trading in and out. It is the approach most long-term investors use.
Buy the Dip — Buying after a price drop on the belief it will recover. It works beautifully in bull markets and destroys accounts in real downtrends, because every leg down looks like "the dip" at the time.
Buy to Close — An order that closes a position you previously sold short, by buying back the same stock or option contract. After it fills, that short position is gone.
Buy to Open — An order that starts a brand-new long position, such as buying an option contract you did not own before. It is the first half of a trade; buy to close or sell to close ends it.
Buy-Write — Placing a covered call at the same time you buy the stock, as a single combined trade. It is simply a covered call entered in one step instead of two.
Buyback — When a company purchases its own shares back from the market, reducing the number of shares in public hands. Fewer shares can make each remaining share represent a bigger slice of the company.

C

Calendar Spread — An options spread using the same strike price but two different expiration dates: you sell the sooner one and buy the later one. It profits mainly from the near option losing time value faster, and the most you can lose is the debit you paid.
Call Option — A contract giving you the right, but not the duty, to buy 100 shares of a stock at a set price (the strike price) any time before a set date. You pay a premium for this right, and that premium is the most you can lose.
Call Wall — The strike price with the largest amount of call open interest, often tracked with gamma exposure (GEX) tools. Price frequently stalls near a call wall, but it is a level to watch, not a force field — walls get run over on strong days.

Candle Body — The thick middle part of a candlestick, stretching from the open price to the close price. A long body shows one side won decisively that period; a tiny body shows a standoff.
Candlestick — A chart shape that shows a period's opening price, closing price, and the high and low in between, using a thick body and thin wicks. Green usually means the price rose during the period; red means it fell.
Cap-Weighted Index — An index where bigger companies count for more, in proportion to their market capitalization (share price times shares). The S&P 500 works this way, so a handful of giants can drive most of the index's movement.
Capital — The money and assets you have available to invest or run a business. In trading, your capital is the cash you could put at risk.
Capital Gain — The profit you make when you sell an investment for more than you paid for it. Example: buy at $50, sell at $70, and your capital gain is $20 per share.
Capital Gains Tax — The tax you may owe on a capital gain after you sell. Investments held over a year usually get a lower tax rate than ones held a year or less; this is educational only, not tax advice — talk to a tax professional.
Capital Loss — The loss you take when you sell an investment for less than you paid for it. Example: buy at $70, sell at $50, and your capital loss is $20 per share.
Capitalization — Also called market cap: the total value of a company in the stock market, found by multiplying the share price by the number of shares. A $100 stock with 1 billion shares has a capitalization of $100 billion.
Capitulation — The moment discouraged holders finally give up and sell all at once, usually on very heavy volume near the end of a decline. It often happens close to a bottom — but "close" can still mean a lot more pain first.
Cash Account — A brokerage account where you can only trade with money you have actually deposited and settled — no borrowing. It is the simplest and safest account type for beginners.
Cash Drag — The slow cost of keeping too much money sitting in cash while the rest of the market rises. Cash feels safe, but over years its return usually loses to even mild inflation.
Cash Flow — The movement of money into and out of a business or account over a period. A company with strong positive cash flow takes in more cash than it spends.
Cash Flow Statement — One of a company's three main financial reports, showing the actual cash that came in and went out during a period. Unlike the income statement, it is hard to dress up — cash either arrived or it did not.
Cash Settlement — When a contract is settled by paying the cash difference in value instead of delivering the actual item, like shares or barrels of oil. Index options such as SPX settle this way.
Cash-Secured Put — Selling a put option while keeping enough cash in the account to buy the shares if you are assigned. Example: sell a $50 put and hold at least $5,000 cash (100 shares times $50) — your real risk is the stock falling far below $50, so only do it on stocks you genuinely want to own.
Catalyst — A news event or announcement that pushes a stock's price to move, such as an earnings report, a new product, or a government decision. Traders watch calendars to know when catalysts are coming.
Certificate of Deposit (CD) — A savings product at a bank where you lock money away for a set time (say one year) in exchange for a fixed interest rate. Taking it out early usually costs you interest as a penalty.
Channel — Two parallel lines that contain most of a price trend, one above price and one below. Traders watch price bounce between the lines — and pay attention when it finally escapes, because that can mean the trend is changing.
Chart — A picture of how a price has moved over time. Charts are the main tool traders use to study past price behavior and plan trades.
Chart Pattern — A recognizable shape that prices sometimes form on a chart, like a triangle or a double top, which traders watch for clues about what might happen next. Patterns are tendencies, not promises.
Choppiness Index — An indicator scored roughly 0 to 100 that judges whether the market is trending smoothly or chopping sideways. Readings above about 61.8 suggest chop and below about 38.2 suggest a trend — a guide for matching your strategy to conditions, not a buy or sell signal.
Churning — Trading far too much. When a broker does it to a client's account it is illegal, because the trades exist to generate commissions; when you do it to yourself, the costs and mistakes quietly eat your account the same way.
Circuit Breaker — A pre-set rule that temporarily pauses trading across the market after a very sharp fall, giving everyone time to calm down and absorb news. Individual stocks have similar pause rules for extreme moves.
Clearing House — A neutral middleman organization that stands between buyers and sellers to make sure every trade is completed and paid as promised. It greatly reduces the risk that one side fails to deliver.
Closing Auction — The final few minutes of the trading day when orders are matched in one big batch to set each stock's official closing price. Huge funds trade heavily here, which is why volume explodes in the last minutes.
Closing Bell — The bell rung at 4:00 PM Eastern Time that signals the end of the regular trading day on the New York Stock Exchange. After it, regular trading hours are over.
Closing Price — The final price at which a stock or contract traded during a regular trading session. It is the price most often quoted in news reports about the day.
Cold Wallet — A crypto wallet whose keys are stored on a device that is not connected to the internet, such as a small hardware device kept offline. It protects against online hacking, but if you lose the device and its backup phrase, the money is gone for good.
Collar — An options strategy where you own a stock, buy a protective put (insurance against a fall), and pay for it by selling a call that caps your upside. It limits both your possible loss and your possible gain.
Collateral — Something of value pledged to back up a loan or a trade. If you fail to meet your obligation, the lender can take the collateral — in margin accounts, the securities you bought are the collateral.
Commission — A fee a broker charges for executing a trade. Many US brokers now charge zero commission on stock trades but still charge a per-contract fee on options — check your broker for the current number.
Commission-Free Trading — Broker pricing where you pay no visible fee per trade. The broker still earns money, mainly by routing your orders to firms that pay for them — so "free" means the cost is hidden in tiny price differences, not that trading costs nothing.

Commitment of Traders (COT) Report — A free weekly government report (published by the CFTC on Fridays) showing how big futures traders — commercial hedgers, large speculators, and small traders — are positioned. It shows positioning, not the future; use it as background, never as a signal by itself.
Commodity — A basic raw product that is the same no matter who produces it, like oil, gold, wheat, or coffee. Commodities are traded heavily with futures contracts.
Common Stock — The standard ownership shares of a company that most people buy, usually carrying voting rights on company matters. If a company fails, common stockholders are paid last, after lenders and bondholders.
Compound Annual Growth Rate (CAGR) — The smooth yearly growth rate that would turn a starting value into an ending value. If $10,000 became $16,000 in five years, that is a CAGR of about 9.9% — real returns bounce around year to year; CAGR is just the average path.
Compound Interest — Earning interest not only on your original money but also on the interest it has already earned, so growth snowballs over time. Starting early matters more than starting big.
Consolidation — A period when a price moves sideways within a fairly tight range after a bigger move, as buyers and sellers take a breather. Traders watch for the price to break out of the range.
Consumer Price Index (CPI) — A government report measuring how much everyday goods and services cost compared with before — the most watched measure of inflation. CPI releases often move the whole market because they influence interest-rate decisions.
Contango — When futures contracts for later months cost more than contracts for nearer months, which is the normal pattern for many commodities. It reflects costs like storage and insurance over time.
Contract — A standardized legal agreement traded on an exchange, such as an option or futures contract, that spells out exactly what is being bought or sold, how much, and by when. One standard stock option contract covers 100 shares.
Contract Month — The month in which a futures contract expires and must be settled or rolled into a later month. Traders name futures by their contract month, like the December crude oil contract.
Contract Month Codes — The single letters futures traders use for delivery months: F January, G February, H March, J April, K May, M June, N July, Q August, U September, V October, X November, Z December. That is why a December S&P 500 futures contract is written ESZ — ES, then Z for December, then the year.
Contrarian — An investor who deliberately goes against the crowd — buying when most people are fearful and prices are beaten down, or pulling back when everyone is euphoric. It sounds simple but is emotionally very hard.
Convergence — The futures idea that as a contract reaches expiration, its price must meet the real cash (spot) price of the thing it tracks. On the last day there can be no gap between "price later" and "price now."
Convertible Bond — A bond that can be exchanged for a set number of shares of the company's stock. It pays interest like a bond but can join in if the stock takes off — usually in exchange for a lower interest rate than a plain bond.
Core Inflation — The inflation rate with food and energy prices removed, watched closely by the Federal Reserve because those two swing wildly month to month. It is meant to show the underlying trend of prices, even though your grocery bill disagrees.

Core Position — The main, long-term holding a trader or investor builds around, as opposed to smaller side trades. Many people keep a core in broad index funds and take their active trades around it with a small part of the account.
Correction — A market or stock decline of 10% or more from a recent high, but less than the 20% that defines a bear market. Corrections are common and usually healthy, even though they feel scary.
Correlation — How closely two things move together, measured from +1 (perfectly together) to −1 (perfectly opposite), with 0 meaning no relationship. Owning ten tech stocks that all move together is not diversification, because their correlation is near +1.
Cost Basis — The total original cost of an investment, including the purchase price and fees, used to figure out your profit or loss and your taxes. If you paid $500 for shares plus a $5 fee, your cost basis is $505.
Cost Basis Method — The rule your account uses to decide which shares you sold when you own the same stock bought at different prices — first-in-first-out (FIFO) sells your oldest shares first, while specific-lot selection lets you pick exactly which shares. The choice changes your tax bill, so it is worth setting deliberately before you sell, and you should confirm the details with a tax professional.
Cost of Carry — Everything it costs to hold something until a future date: storage, insurance, and the interest on the money tied up. These costs are a big reason futures prices differ from today's cash price.
Counterparty Risk — The risk that the other side of a deal fails to hold up its end — a broker, a bank, or an exchange collapses before paying you. It is why regulation, clearing houses, and segregated accounts matter, especially in crypto markets where protections are thinner.
Coupon — The regular interest payment a bond makes to its owner, usually expressed as a yearly percentage of the bond's face value. A $1,000 bond with a 5% coupon pays $50 a year.
Covered Call — Selling a call option on a stock you already own at least 100 shares of, collecting the premium as income. Your shares cover the obligation if the buyer exercises, but your upside is capped at the strike price.
Credit Rating — A letter grade from agencies like Moody's, S&P, and Fitch judging how likely a borrower is to repay: AAA is the safest, and anything below BBB− is considered "junk." Ratings are opinions that have been wrong before — they are a starting point for research, not a guarantee.
Credit Spread — An options strategy where you sell one option and buy another of the same type further from the money, receiving more premium than you pay. Your maximum loss is capped at the gap between the two strike prices minus the credit you received.
Cross Margin — A margin setup where your whole account's positions support each other, so gains in one position can cover requirements in another. It is efficient but dangerous: one bad position can pull margin from everything else you hold.
Crowded Trade — A trade so popular that nearly everyone is already in it. Crowded trades feel safe — until everyone tries to exit through the same small door at once and the move turns violent.
Cup and Handle — A chart pattern shaped like a teacup: price falls and rounds back up (the cup), pauses with a small dip (the handle), then breaks upward. It is a popular pattern, which also means it is widely watched and can fail like any other.
Currency — The money of a country, such as US dollars, euros, or Japanese yen. Currencies are traded in pairs, betting that one will strengthen against the other.

Currency Pair — The two currencies quoted against each other in forex trading, such as EUR/USD, where the first is priced in terms of the second. You are always buying one currency while selling the other — never just "buying the euro."
Current Ratio — A quick health check for a company: its current assets (things convertible to cash within a year) divided by its current liabilities (bills due within a year). A ratio above 1 means it can cover its near-term bills on paper.
Custodial Account — An investment account an adult opens and controls for a minor, such as a UGMA or UTMA account in the US. The money legally belongs to the child and becomes fully theirs at the age set by state law.
Cyclical Stock — A stock whose business rises and falls with the economy, like airlines, car makers, and hotel chains. These companies earn the most when times are good and suffer first when times turn bad.

D

Daily range — The distance between a stock's highest and lowest price in a single trading day. A stock that traded between $48 and $52 has a daily range of $4, which tells you how much it typically moves in a day.
Dark pool — A private trading venue where big investors buy and sell away from the public exchanges, so their large orders do not move the price before they finish. Regular investors buy and sell on public exchanges instead.
Day order — An order to buy or sell that cancels automatically if it has not filled by the end of that trading day. If you place a day order at 10 AM and it never executes, it is gone at the 4 PM close.
Day trade — Buying and selling the same stock or option on the same day, opening and closing the position before the market closes. Buying shares at 10 AM and selling them at 2 PM is one day trade.
Day trader — Someone who makes day trades often, trying to profit from small price moves within a single day. Brokers flag very frequent day traders in margin accounts, and special equity rules can apply — the classic rule required $25,000 in the account, regulators have been replacing it with intraday-margin standards, so check your own broker's current rule.
Dead cat bounce — A small, brief price rise in the middle of a bigger fall, after which the price keeps dropping. It tricks some buyers into thinking the worst is over when it is not.
Dead money — Money sitting in an investment that is going nowhere, neither rising nor paying anything worthwhile. Traders call a flat, stuck stock dead money because that cash could be working somewhere else.
Death cross — A chart signal where a stock's 50-day average price crosses below its 200-day average price, after the stock has been falling. Some traders treat it as a warning sign for the long term, but it appears after much of a decline has already happened and is not a guarantee.
Debit — Money you pay out to open a trade. If an option spread costs you $200 to open, that $200 is a debit.
Debit spread — An options trade with two parts (one bought, one sold) that you pay money to open. For a basic debit spread, the most you can lose is the amount you paid, and the most you can gain is the spread's width minus what you paid.
Debt — Money that is owed. A company with debt has borrowed money it must pay back, the same way a person owes money on a loan.
Decay — The steady loss of an option's time value as expiration gets closer, also called time decay or theta decay. It works against option buyers every single day, even if the stock does not move at all.
Deep in the money — Describes an option that already has a lot of built-in value because the stock price is far past the strike price. Example: a call with a $50 strike price while the stock trades at $70 is deep in the money.
Deflation — The opposite of inflation: prices in general slowly falling over time, so a dollar buys more later than it does today. It sounds nice but can signal a weak economy.
Deleveraging — Cutting back on borrowed money and debt, by a company, a fund, or a whole market. When everyone deleverages at once by selling, prices can fall fast, as happened in the 2008 crisis.
Delisting — When a stock is removed from an exchange, usually because the company broke the exchange's rules or its price fell too low for too long. After delisting, the stock becomes much harder to buy and sell.

Delivery — In futures, the moment the actual goods behind a contract (like oil or gold) are due to change hands. Most traders close or roll their futures contracts before delivery so they never deal with real barrels or bars.
Delta — An options number that estimates how much an option's price will move if the stock moves $1. A delta of 0.40 means the option gains roughly $0.40 if the stock rises $1, and loses roughly $0.40 if the stock falls $1.
Delta hedging — Adjusting a position to offset its directional risk, usually by buying or selling shares against an options position. Market makers do this constantly so a big stock move does not hurt them too much either way.
Delta neutral — A position set up so a small move in the stock barely changes its value, because the positive and negative deltas cancel out. Traders use it when they want to bet on volatility or time passing rather than on direction.
Demand — How much of something buyers want at a given price. When demand is high and supply is limited, prices tend to rise.
Depreciation — An accounting way of spreading the cost of a long-lived asset, like factory equipment, across the years it is used instead of all at once. It lowers reported profit on paper even though no cash left the company that year.
Derivative — A contract whose value comes from something else, like a stock, an index, or a commodity. Options and futures are derivatives — they have no value on their own, only through the thing they are based on.
Descending triangle — A chart pattern where the price keeps hitting the same flat support level while its highs get lower and lower, squeezing it into a downward-pointing triangle. It often resolves with a break below support, but the pattern fails plenty of times.
Diagonal spread — An options spread using two different strike prices AND two different expiration dates. It blends a calendar spread and a vertical spread, and its risk is typically limited to the debit paid.
Diamond hands — Internet slang for holding an investment through big drops and pressure to sell, refusing to let go. It sounds brave, but holding a truly broken investment all the way down is how small losses become disasters — a plan beats stubbornness.
Dip — A small, short-term drop in a price. "Buying the dip" means buying after that small drop, hoping the price climbs back.
Discount broker — A broker that charges very low or zero commissions and offers few extras like advice or research. Most modern app-based brokers are discount brokers.
Discretionary trading — Trading by human judgment, feel, and experience rather than by fixed written rules. It can work for seasoned traders, but beginners using pure discretion usually end up trading their emotions instead.
Distribution day — A day when a major index falls on heavier trading volume than the day before, hinting that big institutions are selling. A cluster of distribution days in a few weeks is a classic warning that an uptrend may be tiring.
Diversification — Spreading your money across different investments instead of putting it all in one. If you own 20 different stocks and one crashes, the other 19 soften the blow.
Dividend — A cash payment a company sends its shareholders — like a small thank-you check for owning the stock. Not every company pays one, and dividends are never guaranteed.

Dividend capture — A strategy of buying a stock just before its ex-dividend date to collect the dividend, then selling soon after. It rarely works as free money, because the stock's price usually drops by about the dividend amount on the ex-date.
Dividend payout ratio — The share of a company's profit paid out as dividends. A company earning $4 per share and paying $1 in dividends has a payout ratio of 25%; a ratio near or above 100% can mean the dividend is at risk.
Dividend yield — A simple way to compare dividends: the yearly dividend divided by the stock price, shown as a percent. A stock at $50 paying $2 a year in dividends has a dividend yield of 4%.
Doji — A single candlestick on a chart where the price opened and closed at almost the same place, leaving a very small body with wicks sticking out. It suggests buyers and sellers are evenly matched and undecided.
Dollar index (DXY) — An index measuring the US dollar's value against a basket of other major currencies. A rising dollar index can pressure company profits from overseas sales and often weighs on gold and other commodities.
Dollar-cost averaging — Investing the same amount of money on a regular schedule, no matter the price — for example, $100 into an index fund every payday. You automatically buy more shares when prices are low and fewer when prices are high.
DOM (depth of market) — A live display, common in futures, showing the stack of waiting buy and sell orders at each price above and below the current one. It shows orders, not intentions — big orders can be pulled in an instant, and the DOM never shows what price will do next.
Double bottom — A chart pattern shaped like a W, where price fell to a low, bounced, and fell to about the same low again before rising. Some traders read it as a possible sign a downtrend is ending, but it is never a guarantee.
Double top — A chart pattern shaped like an M, where price rose to a high, pulled back, and rose to about the same high again before falling. Some traders read it as a possible sign an uptrend is ending, but it is never a guarantee.
Dow Jones Industrial Average — A famous index that tracks 30 very large, well-known US companies, such as Apple and Walmart. When news reports say "the Dow rose 200 points," this is the index they mean.
Downside — How much you could lose if a trade goes wrong. If you buy a stock at $40 and it could realistically fall to $30, your downside is about $10 a share.
Downtrend — A stretch where a price keeps making lower highs and lower lows, like a staircase going down. The general direction is down even though there are small bounces along the way.
Drawdown — The drop from a high point down to a low point, usually measured in your account or in a stock's price. If your account falls from $10,000 to $8,000, you are in a 20% drawdown.
Due diligence — Doing your homework before putting money into something: reading about the company, checking its finances, and understanding the risks. Never skip it just because someone online is excited.

E

E-mini futures — Smaller, electronically traded futures contracts on indexes, like the ES, which tracks the S&P 500. Even smaller "micro" versions, like the MES, exist so beginners can trade with less money at risk per point.
Earnings — A company's profit for a period of time, usually reported every three months. If a company brought in $1 billion and spent $800 million, its earnings are $200 million.
Earnings guidance — A company's own forecast for how it expects to do in the coming months, given when it reports earnings. Stocks often move sharply when a company raises or lowers its guidance.
Earnings per share — A company's profit divided by its number of shares, written as EPS. If a company earned $10 million and has 5 million shares, its EPS is $2 per share.
Earnings report — The official update a company publishes every three months showing its sales, profit, and outlook. Stock prices often jump or drop right after it comes out.
Earnings season — The few weeks, roughly in January, April, July, and October, when most big companies release their earnings reports one after another. Markets tend to be extra jumpy during these weeks.
Earnings surprise — The difference between what a company actually earned and what analysts expected it to earn. A big surprise in either direction is a common reason a stock jumps or drops right after an earnings report.
Earnings whisper — An unofficial earnings estimate that circulates among traders, separate from the published analyst consensus. Whispers are rumors by nature — a stock can beat the official estimate and still fall if it misses the whisper.
Earnings yield — Earnings per share divided by the stock price, shown as a percent — the flip side of the P/E ratio. A stock with a P/E of 20 has an earnings yield of 5%, handy for comparing stocks against bond yields.
EBITDA — A measure of a company's operating profit before subtracting interest, taxes, depreciation, and amortization — roughly, what the core business earns. It is not the same as cash flow or true profit, and companies sometimes highlight it to make results look better than they are.
Economic calendar — A schedule listing upcoming economic reports and events, like jobs numbers, inflation reports, and Federal Reserve meetings. Traders watch it because these events can move the whole market.
Economic indicator — A statistic that shows how the economy is doing, such as the unemployment rate or the inflation rate. Investors watch these numbers to guess where the economy and markets may head next.
Economic moat — A lasting advantage that protects a company from competitors, like a famous brand or being the cheapest producer. The term was popularized by investor Warren Buffett.
Effective rate — Short for the effective federal funds rate: the actual average interest rate banks really charged each other for overnight loans, published by the Federal Reserve Bank of New York. It usually sits close to the Federal Reserve's target rate but is the real-world number banks paid.
Elasticity (options) — A measure of how much an option's price moves, in percent, for a 1% move in the stock. Cheap, far out-of-the-money options have very high elasticity, which is why they can double — or lose half their value — on a small stock move.

Elliott Wave Theory — The idea, followed by some chart traders, that prices move in repeating wave-like patterns driven by crowd psychology. It is a theory for reading charts, not a proven rule, and different traders often count the waves differently.
EMA ribbon — A chart display of several exponential moving averages of different lengths fanned out like ribbons. When the ribbon spreads out in order, traders read it as a strong trend; when it twists together, the market is choppy and trendless.
End of day — The close of the regular trading session, 4:00 PM Eastern Time for US stocks. Prices quoted as "closing prices" are from this moment.
Engulfing candle — A candlestick pattern of two candles where the second candle's body completely covers the first one's body. A green candle engulfing a red one after a drop can signal buyers taking over, and the reverse can signal sellers taking over.
Enterprise value (EV) — A measure of what a whole company is worth to a buyer: its market cap plus its debt, minus its cash. It is often a fairer size measure than market cap alone, because a buyer takes on the company's debt but keeps its cash.
Entry point — The price at which you get into a trade. If your plan says to buy a stock when it reaches $75, $75 is your entry point.
Equity — Ownership. Owning stock means owning equity in a company, and the word is also used for the total value of your trading account (your cash plus your positions).
Equity curve — A line graph showing the value of a trading account over time. A healthy equity curve generally climbs, while a jagged one crashing downward shows a strategy that is losing money.
Equity risk premium — The extra return investors expect from stocks, above the safe return on government bonds, as payment for taking stock market risk. If stocks are expected to return 8% and safe bonds pay 4%, the equity risk premium is about 4%.
ETF — Short for exchange-traded fund: a basket holding many stocks or bonds that you can buy and sell as a single ticker, like a stock, all day long. One share of an S&P 500 ETF gives you a tiny piece of all 500 companies at once.
ETF premium and discount — The small gap between an ETF's market price and the actual value of everything it holds. If an ETF trades above the value of its contents it is at a premium, and below it, at a discount; for big popular ETFs the gap is usually tiny.
European-style option — An option that can only be exercised on its expiration day, never before. Many index options work this way — SPX options are European-style and cash-settled.
Evening star — A three-candle pattern at the top of an uptrend: a strong green candle, a small indecisive candle, then a strong red candle. Some traders read it as a possible sign the uptrend is ending, but like all patterns it is a hint, not a promise.
Event risk — The risk that a sudden specific event — an earnings report, a court ruling, an FDA decision, a central bank surprise — gaps a price before you can react. Stops do not protect against gaps, which is why position size matters most around known events.
Ex-dividend date — The first day a stock trades without the upcoming dividend attached. To receive a dividend, you must own the stock before this date; if you buy on or after it, the seller gets the payment instead.
Exchange — The marketplace where trades happen, such as the New York Stock Exchange (NYSE) or the Nasdaq. Think of it as the official store where stocks are bought and sold.

Exchange rate — How much one currency is worth in terms of another. If the EUR/USD rate is 1.10, one euro is worth $1.10.
Execution quality — How good your fills actually are: how close your price was to the market price when you clicked, and how fast and completely the order filled. Poor execution quietly eats profits, especially in fast-moving or thinly traded names.
Exercise — Using the right an option gives you. Exercising a call means buying 100 shares at the strike price; exercising a put means selling 100 shares at the strike price.
Exercise price — Another name for an option's strike price: the set price at which the option lets you buy or sell the stock. A $150 exercise price means the trade happens at $150, no matter where the stock actually trades.
Exhaustion gap — A gap in the direction of a trend that appears near the trend's end, after a long run, often on very heavy volume as the last buyers or sellers pile in. When a stock gaps up one final time and then stalls, traders suspect the move is exhausted.
Exit point — The price at which you plan to get out of a trade, either to take a profit or to cut a loss. Deciding your exit point before you enter is a core habit of careful traders.
Expected move — The amount a stock is predicted to move over a set time, worked out from its options prices (implied volatility). If a $100 stock has an expected move of $5 into earnings, the options market is pricing a finish roughly between $95 and $105 — a forecast, not a boundary.
Expense ratio — The yearly fee a fund charges, shown as a percent of your money. An expense ratio of 0.10% means you pay $10 a year for every $10,000 invested in that fund.
Expiration date — The last day an options contract exists. After this date the option is gone — if it has value it is typically settled automatically, and if not, it expires worthless.
Expiration pinning — The tendency of a stock to drift toward a heavily traded option strike price as expiration nears, as option sellers and market makers adjust their hedges. It is a tendency, not a magnet, and news can overwhelm it at any time.
Extended-hours trading — Trading that happens before the regular 9:30 AM open (pre-market) or after the 4:00 PM close (after-hours). Fewer people are trading then, so prices can swing more and orders can fill at worse prices.
Extrinsic value — The part of an option's price that is above its built-in (intrinsic) value — you are paying for time left and expected movement. This is the part that melts away as expiration approaches.

F

Face value — The amount a bond promises to pay back when it ends (matures), usually $1,000 per bond. It is also called par value.
Fade — Trading slang for betting against a move: selling into a sharp rally or buying into a sharp drop, expecting it to reverse. Fading a strong trend is one of the fastest ways beginners get run over — the move usually has more room than it looks.
Fair value (futures) — The theoretical price a futures contract should trade at, based on the underlying index plus interest costs minus dividends. When futures trade above or below fair value before the open, it hints at how the cash market may open.
Falling knife — Slang for a stock dropping fast and hard. "Catching a falling knife" means buying it while it is still plunging, which often means catching more losses — traders prefer to let it hit the floor and stop bouncing first.
Fear and Greed Index — A 0-to-100 gauge published by CNN that blends several market measures into one mood reading, from extreme fear to extreme greed. It describes the crowd's mood; it does not predict what happens next.
Fed pivot — Slang for the Federal Reserve switching direction on interest rates, such as from raising rates to cutting them. Markets often rally on pivot hopes, and disappointments when a pivot does not come can be sharp.
Federal funds rate — The target interest rate, set by the Federal Reserve, that banks charge each other for overnight loans. It influences almost every other interest rate, from credit cards to mortgages.
Federal Reserve (Fed) — The central bank of the United States. Its job is to keep prices stable and employment strong, and its decisions on interest rates move the entire stock market.
Fibonacci extension — A chart tool that projects where a price might travel beyond its previous high or low, using ratios like 127.2% and 161.8% of an earlier move. Traders use the levels as possible targets or pause points, but they are conventions, not guarantees.
Fibonacci retracement — A chart tool that draws lines at set percentages (like 38.2%, 50%, and 61.8%) of a price move, marking spots where a pullback might pause. Many traders watch these levels, though they are guidelines, not guarantees.
Fill — The completion of your order — the moment your buy or sell actually happens. A "fill price" is the exact price you got, which may differ slightly from the price you saw when you clicked.
Fill or kill (FOK) — An order instruction meaning: fill the entire order right now at my price, or cancel it completely — no partial fills, no waiting. It is mostly used by fast or institutional traders.
Financial statement — One of a company's official report cards: the income statement (sales and profit), the balance sheet (what it owns and owes), and the cash flow statement (cash in and out). Public companies must publish these every quarter.
Fiscal policy — Government decisions about taxes and spending, made by Congress and the President, as opposed to monetary policy, which is the Federal Reserve's interest-rate decisions. Big tax or spending changes can move markets and whole industries.
Fiscal year — A company's 12-month accounting year, which does not have to match the calendar year. A retailer might end its fiscal year in January, right after the holiday season.
Fixed income — Investments that pay a set, predictable stream of interest, mainly bonds. People call them fixed income because the payments are scheduled in advance, unlike stock dividends.
Flag pattern — A short, tight pause on a chart that slopes slightly against a strong move, shaped like a small flag after a steep "flagpole." It often continues in the direction of the original move, but failed flags reverse hard.
Flash crash — A sudden, severe market drop that reverses within minutes. In the famous 2010 flash crash, the Dow fell almost 1,000 points in minutes and then recovered most of it the same day.
Flat — Holding no position at all in something. If you sell all your shares of a stock, you are flat that stock — no risk, no reward from it until you buy again.
Float — The number of a company's shares actually available for the public to trade. A stock with a small float (few shares available) can jump or crash quickly because even modest buying or selling overwhelms it.

Float rotation — When trading volume in a small-float stock reaches or exceeds the entire float in a single day, meaning the available shares have effectively changed hands once over. It signals extreme speculative frenzy and usually comes with violent price swings.
FOMC — Short for Federal Open Market Committee, the group inside the Federal Reserve that votes on interest rates. It meets eight times a year, and its announcements are some of the most market-moving events on the calendar.
FOMO — Short for "fear of missing out": the urge to buy something just because its price is running up and everyone is talking about it. FOMO is a feeling, not a strategy, and it leads many beginners to buy at the worst moment.
Footprint chart — An advanced chart, used mostly in futures, that breaks every candle into the actual buy and sell volume traded at each price inside it. It shows real orders and prints, not intent or the future — no chart can show what price will do next.
Forex — Short for foreign exchange: the global market where currencies are traded in pairs, like euros against US dollars (EUR/USD). It is the largest market in the world and trades around the clock on weekdays.
Forward P/E — A P/E ratio calculated with analysts' expected earnings for the next 12 months instead of past earnings. It looks kinder when earnings are expected to grow, but it rests on forecasts that can be wrong.
Fractional share — A piece of a share, less than one whole share. If a stock costs $400 and you invest $50, you can own 0.125 of a share instead of nothing.
Free cash flow — The cash a company has left after paying its operating costs and buying the equipment it needs to keep running. It is the money truly available for dividends, buybacks, debt payments, or growth, and many investors value it above reported profit.
Freeriding — A cash-account violation: buying a stock with money that has not settled yet and selling it before that money arrives. Doing it can get your account restricted, so wait for funds to settle.
Front month — The futures contract that expires soonest and is usually the most actively traded. When traders say "the ES front month," they mean the nearest upcoming ES contract.
Front-running — When a broker or insider trades ahead of a big client order they know is coming, profiting from the price move that order will cause. It is illegal and unethical.
Fund — A pool of money collected from many people and invested together, such as a mutual fund or an ETF. Instead of picking one stock, your money is spread across everything the fund holds.
Fundamental analysis — Judging an investment by the health of the business itself: its sales, profit, debt, and competition, to decide what it is really worth. It is the opposite of technical analysis, which studies price charts.
Funding rate — In crypto perpetual futures, a small periodic payment between buyers and sellers that keeps the contract's price close to the spot price. When the rate is very positive, buyers are crowded and pay sellers — a sign of speculation running hot.
Futures — Contracts where two sides agree to trade something (like oil, gold, or a stock index) at a set price on a future date, and both sides must honor the deal. Futures use leverage, so gains and losses are magnified, and beginners can lose money very fast.
Futures commission merchant (FCM) — The regulated firm that holds futures traders' accounts and handles their orders and margin — the futures world's version of a broker. Your futures broker must be registered, and you can verify it with regulators before depositing money.
Futures contract — One single futures agreement. Each one has a standard size and dollar value per point — for example, each point the ES futures contract moves is worth $50.
Futures expiration — The last day a futures contract can trade before it ends. Traders who do not want delivery close the contract or roll it into the next month's contract before this date.
Futures roll yield — The gain or loss created when a futures position is rolled from an expiring contract into the next one, depending on whether the next contract is cheaper or more expensive. When later contracts cost more (contango), long-term holders of futures-based products steadily lose a little on every roll.
Futures spread — A position holding two related futures contracts at once, such as long one month and short another (a calendar spread), to bet on the price difference between them rather than on overall direction. Spreads usually move less violently than outright positions, but they can still lose money.

G

Gain — A profit: you sold something for more than you paid for it. Buying at $30 and selling at $38 is a gain of $8 a share.
Gamma — An options number that shows how fast delta itself changes when the stock moves. High gamma means your option's delta will swing quickly, which makes the position more sensitive and harder to predict near expiration.
Gamma exposure (GEX) — An estimate of how much hedging market makers must do, across all options on a stock or index, as the price moves — calculated from options gamma and open interest. Large positive GEX tends to dampen price moves, while negative GEX can amplify them; it is an estimate and a gauge, not a signal or a guarantee.
Gamma flip — The price level where estimated dealer gamma exposure switches from positive to negative (or back). Traders watch it because markets often behave calmer above the flip and wilder below it — a tendency, not a rule.
Gamma scalping — An advanced options strategy where a trader holding options repeatedly buys and sells shares to stay delta neutral, harvesting small stock swings along the way. It demands constant attention and low trading costs, and it is not a beginner strategy.
Gamma squeeze — A sharp price spike driven by options hedging: as a stock rises, market makers who sold call options must buy shares to hedge, pushing the price higher still and forcing more buying. Gamma squeezes can reverse just as violently when the hedging unwinds.
Gap — An empty space on a chart where the price opens much higher or lower than where it closed the day before, skipping the prices in between. Earnings news often causes gaps — a stock closing at $50 might open the next morning at $56.
Gap and go — A day-trading strategy that trades stocks which gap up in the morning and keep running on heavy volume. It is fast and unforgiving — late entries chase extended prices, and failed gap-and-go trades fall quickly.
Gap fill — When a stock's price later moves back across a gap, covering the empty space on the chart. If a stock gaps up from $50 to $56 and later falls back to $50, the gap is filled.
Gap risk — The risk that a price jumps straight past your stop or exit price overnight or on news, so you get out much worse than planned. Gap risk is the main reason a stop loss is a plan, not a guarantee, and why size matters.
GARP (growth at a reasonable price) — An investing approach that looks for growing companies whose stocks are not outrageously priced — a middle path between pure growth investing and pure value investing. The investor Peter Lynch made the style famous.
General obligation bond — A municipal bond backed by the full taxing power of the city, county, or state that issued it. They are generally considered steadier than bonds backed by a single project's revenue, though no bond is risk-free.
Global macro — An investing strategy that bets on big worldwide themes — interest rates, currencies, commodities, and country economies — across many markets at once. It is practiced mostly by large funds and demands deep economic knowledge.
Globex — The CME Group's electronic trading platform, where most futures trades happen. It is why futures trade nearly around the clock, from Sunday evening through Friday afternoon, US Eastern Time.
Going long — Buying something because you expect its price to rise. If you own shares of a stock hoping they go up, you are long that stock — the most basic position there is.
Going private — When a public company's shares are bought out and removed from the stock exchange, so the public can no longer trade them. Shareholders are typically paid a set cash price per share when the deal closes.
Going public — When a private company sells shares to the general public for the first time so anyone can buy them on an exchange. This first sale is called an IPO, an initial public offering.
Going short — Selling something first, planning to buy it back cheaper later, because you expect the price to fall. It is risky: a stock you short can keep rising, so your losses can grow quickly and, with stocks, have no fixed limit.
Golden cross — A chart signal where a stock's 50-day average price crosses above its 200-day average price, after the stock has been rising. Some traders treat it as a hopeful long-term sign, but it is not a guarantee of future gains.
Good 'til canceled (GTC) — An order that stays active until it fills or you cancel it, instead of expiring at the end of the day. A GTC sell order at $60 will sit waiting even if the stock takes two weeks to get there.
Good faith deposit — A nickname for futures margin: the money you must park in your account to hold a futures contract. It is a deposit showing you can cover losses, not a loan and not the full price of the contract.
Good faith violation — A cash-account violation that happens when you buy a stock with money from a sale that has not settled yet, then sell that new stock before the money settles. Too many of these can get your account restricted for 90 days.
Government bond — A loan you make to the US government, sold as a Treasury bond, note, or bill. These are considered among the safest investments in the world and pay you interest.
Gravestone doji — A single candlestick with a long upper wick and its open and close near the bottom, shaped like a gravestone, appearing after a rise. It hints that buyers pushed the price up but sellers dragged it all the way back; traders treat it as a warning sign, not proof of a top.
Greeks — A group of options numbers, named with Greek letters (delta, gamma, theta, vega, and rho), that measure different risks of an option, like how it reacts to price moves, passing time, and volatility. Traders check the Greeks the way a pilot checks dashboard gauges.

Gross domestic product (GDP) — The total dollar value of everything a country produces in a period of time. When GDP grows, the economy is expanding; when it shrinks for two quarters in a row, people often call it a recession.
Gross exposure — The total size of all a trader's or fund's positions added together, longs plus shorts, ignoring offsetting. A fund with $60 million long and $40 million short has $100 million of gross exposure, which shows how much total market risk it carries.
Gross margin — The share of a company's sales left over after paying the direct cost of making its products, shown as a percent. If a company sells $100 of goods that cost $60 to make, its gross margin is 40%.
Gross profit — The same idea as gross margin, but in dollars instead of a percent: sales minus the direct cost of what was sold. $100 in sales minus $60 in product costs equals $40 of gross profit.
Growth investing — A strategy of buying companies expected to grow much faster than average, even if their stocks look expensive today. The bet is that future growth will be worth the high price.
Growth stock — A stock of a company whose sales and profits are growing much faster than average. These companies usually pay no dividend because they reinvest everything into growing, and their prices can swing hard.

H

Haircut — A safety discount a broker or lender applies to the value of your assets when they are used as collateral. Example: a $10,000 stock position with a 25% haircut only counts as $7,500 of borrowing power.
Halt — A temporary pause in trading of a stock, set by the exchange. Halts usually happen when big news is coming out or a price is moving too wildly, and trading restarts a few minutes later.
Halving — In crypto, a scheduled event (Bitcoin's happens about every four years) where the reward paid to miners is cut in half, slowing the creation of new coins. It reduces new supply but does not guarantee the price will rise.
Hammer Candle — A single candle (one bar on a chart) with a long lower tail and a small body near the top. After a fall, it can be an early sign that buyers are stepping in and price may turn up.
Hard Assets — Physical things with real-world value, like real estate, gold, oil, and equipment. People buy them partly because they tend to hold value when paper money loses buying power to inflation.
Hard Stop — A real stop order you place with your broker that sells automatically if price hits your level. It is "hard" because the broker's computer does it for you, even if you are not watching.
Hard to Borrow — A label for a stock that is difficult or expensive to borrow for short selling (betting it will fall). If a stock is hard to borrow, your broker may charge extra fees or block the short sale entirely.
Head and Shoulders — A chart pattern shaped like a head between two shoulders, made of three peaks where the middle peak is the highest. Traders watch it as a possible sign that an uptrend is tiring out and may reverse down.
Head Fake — A quick move in one direction that suddenly reverses, trapping traders who chased it. Example: a stock pops above resistance, buyers pile in, and it immediately dumps back below — the "breakout" was a fake.
Hedge — A second position you take to protect your main position, like insurance. Example: if you own a stock and fear a drop, you might buy a put option so a fall hurts less.
Hedge Fund — A private investment fund for wealthier investors that can use advanced strategies like short selling and leverage. Hedge funds have looser rules than the mutual funds everyday investors buy.
Hedge Ratio — How much of a hedge you need to offset a position's risk, often figured from delta. Example: to hedge 100 shares of stock (delta 100), you might buy 2 put contracts with a delta of −0.50 each (2 × 100 × −0.50 = −100).
Hedging Cost — What you pay for protection, like the premium on a put option bought as insurance. Hedging always costs something, so it lowers your profit when things go well — that is the trade-off for sleeping at night.
Heikin-Ashi — A special kind of candlestick chart that averages the price data to smooth out noise and make trends easier to see. Because the candles are averaged, they do not show the exact real prices — never use them to judge an exact entry or exit price.
High Beta — Describes a stock that moves more than the overall market, both up and down. A stock with a beta of 2 tends to move about twice as much as the S&P 500, so it is riskier and jumpier.
High of Day — The highest price a stock or contract has traded at so far today, often shortened to HOD. Traders watch it because price pushing above it can signal strength.
High-Frequency Trading (HFT) — Trading by computers that place huge numbers of orders in tiny fractions of a second, profiting from tiny price differences. Retail traders cannot compete on speed, which is one more reason not to chase every small wiggle.
High-Yield Bond — A bond from a company with a weaker credit rating, nicknamed a junk bond. It pays higher interest because there is a higher chance the company fails to pay you back.
Higher High — A price peak that is higher than the peak before it. A series of higher highs (with higher lows) is the classic picture of an uptrend.
Higher Low — A price dip that stops at a higher level than the dip before it. It suggests buyers are stepping in earlier each time, which is a sign of an uptrend.
Higher Time Frame — A chart that shows a longer stretch of time per candle, like the daily or weekly chart instead of the 1-minute chart. Big-picture charts show the main trend that smaller charts must fit inside.
Historical Volatility — A measure of how much a stock's price actually moved in the past, based on real price history. It looks backward, unlike implied volatility, which looks forward.
Hold — Keeping a position you already own instead of selling it. If you bought shares and simply keep them while you wait, you are holding.
Holding Period — How long you own something before you sell it. For taxes, holding a stock more than one year usually gets a lower tax rate on profits than selling sooner.
Horizontal Level — A price drawn as a flat line across a chart where price has repeatedly stopped, bounced, or reversed before. Traders treat these levels as likely turning points in the future.
Horizontal Spread — Another name for a calendar spread: options with the same strike price but different expiration dates. It profits mainly from the nearer option losing time value faster than the farther one.
Hot Money — Money that moves in and out of an investment very quickly, chasing fast gains. Hot money rushes in when something is exciting and rushes out just as fast, making prices jumpy.
Hourly Chart — A price chart where each candle covers one hour of trading. Traders use it to see the trend inside the day without the noise of very small time frames.
House Money Effect — The trap of taking bigger, careless risks after a win because the profit "feels" like the market's money instead of yours. It is always your money — protect winnings with the same rules as your starting funds.
Hybrid Security — An investment that mixes features of two types, like a convertible bond that pays interest like a bond but can turn into stock. The mix can be useful, but read the fine print — hybrids come with extra rules and risks.

I

Immediate-or-Cancel (IOC) — An order instruction meaning: fill whatever you can right now and cancel the rest. If 30 of your 100 shares fill instantly, the other 70 are cancelled instead of waiting.
Implied Move — The amount the options market expects a stock to move up or down by a certain date, shown as a dollar amount or a percentage. Traders check it before earnings to see how big a swing is already "priced in."
Implied Volatility — Often shortened to IV, this is how much movement the market expects from a stock in the future, built into option prices. High IV makes options expensive; low IV makes them cheap.
In the Money — Describes an option that already has real value if used right now. Example: a call option with a $50 strike is in the money when the stock trades at $55, because you could buy at $50 and the stock is worth $55.
Income Investing — A strategy focused on regular cash payments — dividends from stocks and interest from bonds — instead of price growth alone. It suits patient investors; the payments are never guaranteed and can be cut.
Income Statement — A company report showing how much money it made and spent over a period, ending with its profit or loss. It answers the basic question: did the business actually make money?
Index — A number that tracks the combined price movement of a group of stocks, like the S&P 500 (500 large companies). You cannot buy an index itself; you trade funds, futures, or options based on it.
Index Fund — A fund that simply copies an index, holding the same stocks in the same proportions. Because no manager is picking stocks, fees are usually very low.
Index Futures — Futures contracts based on a stock index, such as the S&P 500 futures (ES). Traders use them to bet on, or protect against, the whole market moving up or down.
Index Option — An option based on an index instead of a single stock, like SPX options. Index options are settled in cash (no shares change hands) and SPX options can only be exercised at expiration.
Index Rebalancing — When an index like the S&P 500 updates its list of companies, adding some and removing others on a set schedule. Funds that copy the index must buy and sell to match, which can briefly push prices of the added and removed stocks around.
Indicator — A tool drawn on or under a chart that does math on price or volume to help you judge the trend or momentum. Examples include moving averages, MACD, and RSI; indicators suggest, they never guarantee.
Inflation — The general rise in prices over time, which means each dollar buys a little less than before. If inflation is 3%, something that cost $100 last year costs about $103 now.
Inflation Hedge — An investment people hold hoping it keeps its value when inflation eats away at cash, such as gold, real estate, or certain bonds. No hedge is perfect — an asset people call a hedge can still fall in price.
Initial Coin Offering (ICO) — When a new crypto project sells its brand-new tokens to the public to raise money, similar in spirit to an IPO for stocks. ICOs are far less regulated than stock offerings and have been a common vehicle for scams — treat them as extremely risky.
Initial Margin — The amount of money you must put up to open a leveraged position. For stocks it is usually 50% of the purchase; for futures it is a smaller good-faith deposit set by the exchange.
Initial Public Offering (IPO) — The first time a private company sells shares to the public and starts trading on an exchange. After the IPO, anyone with a brokerage account can buy the stock.
Inside Bar — A candle whose entire high-to-low range fits inside the candle before it. It shows price pausing and coiling, and traders watch for a break out of it.
Insider Trading — Buying or selling a stock using secret, important information the public does not have yet. It is illegal, and company executives trading on inside knowledge can face heavy fines and prison.
Institutional Investor — A big organization that invests huge amounts of money, like a pension fund, bank, or hedge fund. Their large trades can move prices, so small traders watch what they do.
Institutional Ownership — The percentage of a company's shares held by big organizations like pension funds, mutual funds, and hedge funds. Heavy institutional buying or selling can move a stock's price a lot because their orders are so large.

Interest Rate — The price of borrowing money, charged as a percentage per year. When the Federal Reserve raises or lowers rates, it affects loans, savings accounts, and usually stock prices too.
Interest Rate Sensitivity — How much an investment's price moves when interest rates change. Long-term bonds and growth stocks tend to be highly sensitive: when rates rise, their prices often fall the most.
Intraday — Anything that happens within a single trading day. An intraday trader (day trader) opens and closes all positions before the market closes and holds nothing overnight.
Intraday Margin — A lower deposit your broker may require for futures positions opened and closed within the same day, instead of held overnight. The smaller deposit means bigger effective leverage — a small move against you can still produce a large loss fast.
Intrinsic Value — The built-in, real value of an option if it were used right now. A call with a $50 strike has $5 of intrinsic value when the stock is $55; anything above that in the option's price is time value.
Inventory — The positions a trader or market maker is currently holding, the way a store holds goods on its shelves. Holding a lot of inventory overnight means carrying risk while the market is closed and news can hit.
Inverse ETF — A fund designed to go up when its index goes down, and down when the index goes up. It lets you profit from a falling market without short selling, but it is built for short-term trades, not long holds.
Investing — Buying something and holding it for months or years, expecting it to grow in value over time. It is the slower, longer-term cousin of trading.
Investment Grade — A quality rating for bonds meaning the borrower is considered fairly safe and likely to repay. Bonds below investment grade are called high-yield or junk bonds.
Investor — Anyone who puts money into something hoping it grows. You become an investor the moment you buy your first share, fund, or bond.
Iron Butterfly — An options strategy using four options that profits most if the stock lands exactly on one middle price at expiration. Risk and reward are both capped, and it is an advanced strategy.
Iron Condor — An options strategy that sells both a call spread above the price and a put spread below it, collecting premium. You profit if the stock stays inside a range, and your maximum loss is capped and known up front.
Island Reversal — A chart pattern where price gaps one way, trades for a few sessions, then gaps back the other way, leaving a small "island" of candles separated by gaps on both sides. It can mark a sharp change in direction, but no pattern is a guarantee.
IV Crush — The sharp drop in implied volatility right after a big expected event, like an earnings report, passes. Option prices can fall hard from IV crush even when the stock moves the way you predicted.
IV Percentile — A measure comparing today's implied volatility to its own range over the past year, shown as a percentage. Example: an IV percentile of 90% means IV has been lower than today on about 90% of the past year's days — options are expensive compared to their recent norm.
IV Rank — A number from 0 to 100 showing where today's implied volatility sits compared with its own range over the past year. Near 100 means options are unusually expensive versus their own history; near 0 means unusually cheap.
IV Skew — The pattern where options at different strike prices carry different implied volatilities — for example, puts below the current price usually cost more (in IV terms) than calls above it. It shows traders pay up for crash protection.

J

January Barometer — An old market saying that the stock market's performance in January hints at how the rest of the year will go. It is a fun piece of folklore, not a reliable rule — never trade real money on a saying.
January Effect — The idea that stock prices, especially smaller stocks, tend to rise more in January than in other months. It is a historical pattern some traders watch, not a promise it will happen.
Jobless Claims — A weekly government report counting how many people filed for unemployment benefits for the first time. Rising claims can signal a weakening job market; it is a smaller, more frequent cousin of the monthly Jobs Report.
Jobs Report — A monthly government report on how many jobs were added or lost and the unemployment rate, usually released on the first Friday of the month. It often moves the whole market within seconds because it hints at the economy's health.
Joint Account — A brokerage account owned by two people, such as spouses, where both can deposit money and place trades. Either owner can usually act on the account without the other's permission.
Joint Venture — When two or more companies team up on one specific project while staying separate companies. News of a joint venture can move both companies' stocks, up or down.
Journal — A written record of every trade you take, including why you entered, where you exited, and what you learned. Reviewing your journal is how traders find and fix their repeated mistakes.
Jumbo Loan — A home loan too large for the standard limits set for government-backed mortgages, so it usually carries stricter approval rules and sometimes a higher interest rate. It matters to real-estate investors borrowing big amounts.
Junior Security — A stock or bond that stands behind others in line to get paid if a company is shut down and sold off. Junior holders get paid last, so they take more risk — and demand higher potential reward for it.
Junk Bond — A nickname for a high-yield bond from a company with a weak credit rating. It pays high interest to make up for the real risk the company might not pay you back.
Junk Bond Spread — The extra interest (yield) junk bonds pay compared to safe government bonds, measured as a difference in percentage points. When this spread widens sharply, it often means investors are scared about the economy.

K

Kagi Chart — A Japanese chart style that draws lines changing direction only when price moves a set amount, ignoring time completely. It filters small noise to highlight trend changes, but it is uncommon on most trading platforms.
Keltner Channels — An indicator that draws two bands above and below a moving average, spaced by how much price typically moves. Price bouncing between or breaking out of the bands helps traders judge trends and stretched moves.
Key Level — An important price where traders expect a reaction, such as a past high, a past low, or a round number like $500. Plans are often built around key levels: buy near support, sell or protect near resistance.

Key Reversal — A session where price first makes a strong new high (or low) and then closes in the opposite direction, near the other end of its range. Traders watch it as a possible turning point, but one candle alone proves nothing — wait for confirmation.
Kicker Pattern — A two-candle pattern where the second candle gaps hard against the first candle's direction, showing a sudden shift in who is in control. It is considered a strong reversal signal, but gaps against you can also mean fast losses if you are on the wrong side.
Knock-Out Option — An option that automatically becomes worthless if the underlying price touches a set barrier level. They are cheaper than regular options for a reason — one touch of the barrier and your entire premium is gone.
Know Your Customer (KYC) — The legal rule that brokers must verify who you are before opening your account. That is why signing up asks for your ID, address, and Social Security number.

L

Laddering — Buying investments with different maturity dates or price levels, spread out like rungs of a ladder — for example, bonds maturing in 1, 3, 5, and 10 years. It balances steady income with flexibility, instead of betting everything on one date.
Lagging Indicator — A tool built from past prices that confirms a trend after it has already started, like most moving averages. It helps you verify what happened, but by design it will always be a little late.
Lambda — An options Greek that measures leverage: roughly how many percent an option's price should move for a 1% move in the stock. A high lambda means explosive percentage swings in both directions — exciting and dangerous.
Large Cap — A big company, usually worth $10 billion or more, like Apple or Walmart. "Cap" is short for market capitalization, the total value of all its shares.
Last Price — The most recent price at which a stock or contract actually traded. It is the number most apps show in big digits next to the ticker.
Last Trading Day — The final day a futures or options contract can be traded before it expires. After this day the contract is settled, so traders must close or roll their position before it.
Leading Indicator — A tool or data series that tries to signal a change before it fully happens, like momentum oscillators or weekly jobless claims for the economy. "Tries" is the key word — leading indicators also give plenty of false alarms.
Letter Stock — Shares that come with restrictions — they cannot be freely sold to the public right away, often because they were issued privately. Restricted shares you cannot sell are riskier than they look on paper.
Level 2 — A data feed showing the stack of waiting buy and sell orders at many prices, not just the best one. It helps traders see where large orders are sitting, though reading it well takes practice.
Leverage — Using borrowed power so a small amount of your money controls a much bigger position. Leverage multiplies gains and losses equally — a 10-to-1 leveraged position loses 10% of your money on just a 1% move against you.
Leveraged Buyout (LBO) — When a company is bought mostly with borrowed money, using the target company's own assets and cash flow to back the loan. After an LBO, the acquired company's stock usually stops trading publicly.

Leveraged ETF — A fund that uses borrowing and derivatives to multiply an index's daily move, aiming for 2 or 3 times the return. Because it resets daily, holding it for weeks can produce surprising results, and it is risky for beginners.
Limit Move — The maximum amount a futures price is allowed to move in one session before the exchange pauses or restricts trading. It is a safety brake against panic moves.
Limit Order — An order to buy or sell only at your chosen price or better. A buy limit at $50 means you pay $50 or less — but if price never reaches $50, your order simply never fills.
Limit Price — The exact price you set on a limit order; the worst price you are willing to accept. For a buy it is your ceiling, and for a sell it is your floor.
Limit Up-Limit Down (LULD) — A stock-market rule that pauses trading in a stock for a few minutes when its price shoots outside a set percentage band in a short time. It is a speed bump against wild, disorderly moves — different from the daily price limits used in futures.
Line Chart — The simplest chart type: one line connecting the closing prices over time. It hides the highs and lows inside each period, so it is good for a clean big-picture view but poor for planning entries and exits.
Liquidation — Selling a position to turn it back into cash, whether by your choice or by force. If your margin account falls too far, your broker can liquidate (force-sell) your positions without asking.
Liquidity — How easily something can be bought or sold without moving its price much. A heavily traded stock like Apple is very liquid; a rarely traded stock can be hard to exit at a fair price.
Liquidity Premium — The extra return investors demand for locking money into something hard to sell quickly, like a small company's stock or real estate. If you may need your cash fast, that extra return may not be worth being stuck.
Liquidity Provider — A firm that constantly posts prices to buy and sell, making it easy for everyone else to trade. Their activity keeps markets smooth and bid-ask spreads small.
Liquidity Risk — The danger that you cannot sell something quickly at a fair price when you want out. It shows up in thinly traded stocks and options, where you may have to accept a much worse price.
Liquidity Trap — An economics situation where interest rates are already near zero and people hoard cash instead of spending, so the central bank's usual tools stop working well. It describes a stuck economy, not a single stock or trade.
Listed Security — A stock or fund officially traded on a major exchange like the NYSE or Nasdaq, meeting that exchange's rules. The opposite is "over-the-counter" (OTC) trading, where standards are looser and information is thinner — extra caution is required there.
Loan-to-Value (LTV) — A lender's measure comparing the loan amount to the property's value, as a percentage. Example: a $180,000 loan on a $200,000 home is 90% LTV — a high LTV means a bigger loan relative to the cushion, and more risk for everyone.
Lock Limit — In futures, when price is stuck at its daily limit and almost no trading can happen beyond that price. Being locked means you may be unable to exit a losing position — one of the unique dangers of futures.
Long — Owning something because you expect its price to rise. If you buy 10 shares of a stock, you are "long 10 shares," and you profit when the price goes up.
Long-Term Capital Gain — Profit from selling something you held for more than one year. In the US it is usually taxed at a lower rate than short-term profits — tax rules change, so check with a tax professional.
Long-Term Investing — Buying and holding for years through ups and downs instead of reacting to daily moves. Retirement accounts are the most common example.
Loss — What happens when you sell something for less than you paid, or a position moves against you. Small, planned losses are a normal cost of trading; the goal is keeping them small.
Loss Aversion — The well-known mental bias where losing money hurts about twice as much as gaining the same amount feels good. It pushes traders to hold losers too long and sell winners too early — a written plan is the cure.
Loss Harvesting — Short for tax-loss harvesting: selling an investment at a loss on purpose to use that loss to lower your tax bill, sometimes buying a similar (but not identical) replacement. Rules like the wash sale rule limit how this works — this is education only, not tax advice.
Loss Limit — A personal rule for the most you will lose before stopping, such as "I stop trading after losing $100 in a day." It protects your account on days when nothing is working.
Lot Size — The standard amount of something in one trade. One stock options contract covers 100 shares, and one futures contract covers a set amount defined by the exchange.
Low Float — A stock with only a small number of shares available for the public to trade. With so few shares around, even modest buying or selling can send the price swinging violently — exciting charts, real danger.
Low of Day — The lowest price a stock or contract has traded at so far today, often shortened to LOD. Traders watch it because dropping below it can signal weakness.
Lower High — A price peak that is lower than the peak before it. Combined with lower lows, it is the classic picture of a downtrend.
Lower Low — A price dip that falls lower than the dip before it. It shows sellers are pushing price to new lows, a sign of a downtrend.

M

MACD — An indicator (Moving Average Convergence Divergence) that compares two moving averages to show momentum — whether a trend is speeding up or slowing down. Traders watch its lines cross as a possible signal that momentum is changing.
Maintenance Margin — The minimum amount of money that must stay in your margin account while a position is open. If your account drops below it, you get a margin call.
Margin — Borrowed money or buying power from your broker that lets you control more than your cash alone could. For futures, margin means something different: a good-faith deposit you post to hold a contract, not a loan.
Margin Account — A brokerage account that lets you borrow money from the broker, use unsettled funds, and sell short. It offers flexibility but charges interest on loans and carries extra rules and risks.
Margin Call — A demand from your broker to add money or close positions because your account fell below the required minimum. If you do not act, the broker can sell your positions for you.
Margin Debt — The total amount of money investors have borrowed from brokers to buy investments, or your own borrowed balance in a margin account. Borrowed money magnifies losses exactly as it magnifies gains, and the interest is a constant drag.

Margin of Safety — An investing principle: only buy when the price is well below what you believe the business is truly worth, leaving room for being wrong. Example: if you estimate a company is worth $80 a share, buying at $55 gives you a margin of safety.
Mark Price — The fair, calculated value used for a futures contract at any moment, based on the underlying market. Brokers use it to figure your profit, loss, and margin fairly.
Mark to Market — The daily process of settling futures accounts: each day, gains are credited and losses are debited in cash based on the closing price. Your futures profit and loss becomes real money in the account every day.
Mark-to-Market Election (Section 475) — A tax election some very active traders make so all their positions are treated as sold at year-end for tax purposes, which also removes the wash sale rule from their trading. It has strict deadlines and rules — education only; this is not tax advice, so talk to a tax professional.
Market Breadth — A measure of how many stocks are rising versus falling across the whole market. Strong breadth means most stocks are joining a move; weak breadth means only a few are carrying it.
Market Cap — The total value of a company in the stock market: share price multiplied by the number of shares that exist. A $50 stock with 100 million shares has a market cap of $5 billion.
Market Crash — A sudden, steep fall in stock prices across the whole market, like the drops in 2008 and March 2020. Crashes are frightening but have historically been followed by recoveries over time.
Market Cycle — The repeating loop markets move through over time: rising trends, topping, falling trends, and bottoming, driven by the economy and investor mood. Knowing which phase you are in helps, but no one can time the turns exactly.
Market Depth — The full picture of waiting buy and sell orders at many price levels, shown in Level 2 data. More depth means bigger orders can trade without moving the price much.
Market Hours — The times a market is open. US stock exchanges trade 9:30 AM to 4:00 PM Eastern on weekdays, while CME futures trade almost around the clock from Sunday evening to Friday.
Market Internals — Gauges that look under the surface of the indexes, like the TICK index (how many NYSE stocks are ticking up minus down at this moment) and breadth (advancers vs. decliners). They are gauges, not signals — they describe the market's health, they do not predict the next move.
Market Maker — A firm whose job is to always offer a price to buy and a price to sell, so trading never stalls. They earn money from the small gap between those two prices, called the spread.
Market Microstructure — The study of how trading actually happens at the smallest level: orders, quotes, spreads, and how exchanges match buyers and sellers. Understanding it explains why you rarely get the exact price you see on the screen.
Market Order — An order to buy or sell right now at whatever the current price is. It almost always fills immediately, but in a fast or thin market the price you get can be worse than expected.
Market Sentiment — The overall mood of traders — fearful, greedy, or somewhere between. Sentiment helps explain why prices sometimes move more than the news alone would suggest.
Market Timing — Trying to buy before rises and sell before falls based on predictions. It sounds simple but is famously hard, because you must be right twice: getting out and getting back in.
Market-on-Close (MOC) — An order instruction to buy or sell at whatever the closing price turns out to be at the end of the day. You give up control of your exact price in exchange for being filled at the close.

Married Put — An options strategy where you buy shares of stock and buy a put option on those same shares at the same time, like taking out an insurance policy the day you buy a car. The put caps your downside, and its premium is the cost of that protection.
Max Pain — The price where, at expiration, the largest number of option contracts would expire worthless and option buyers as a group lose the most. Some traders watch it as a magnet price, though it is a theory, not a rule.
Maximum Drawdown — The biggest peak-to-bottom fall an account or strategy suffered over a period. Example: an account that ran up to $12,000 and then dropped to $8,400 had a maximum drawdown of 30% — know this number before you trust any strategy.
Maximum Loss — The most money a trade can possibly lose, if it can be known in advance. A bought option's maximum loss is the premium you paid; defined-risk spreads also have a fixed maximum loss.
Mean Reversion — The idea that prices that stretch far from their average tend to drift back toward it, like a rubber band snapping back. Traders who use it buy sharp dips and sell sharp spikes.
Melt-Up — A fast, sharp market rise driven by fear of missing out, as late buyers rush in all at once. Melt-ups feel great while they last, but prices pushed up by panic buying can fall just as fast.
Meme Stock — A stock that becomes wildly popular through social media attention rather than the company's business results, like GameStop in 2021. Meme stocks can multiply or collapse in days — the attention is the fuel, and attention moves on.
Mental Stop — A stop-loss level you keep only in your head instead of placing a real order with your broker (also called a soft stop). It only works if you actually act on it — in a fast move, hesitation turns a small planned loss into a big one.
Micro Futures — Smaller versions of popular futures contracts, one-tenth the size of the standard "E-mini" contracts. The Micro E-mini S&P 500 (MES) is worth $5 per point instead of $50, so beginners risk far less per trade.
Microcap Stock — A very small company, usually worth under $300 million. Microcaps can swing wildly and are often thinly traded, making them risky for beginners.
Mid Cap — A medium-sized company, usually worth between about $2 billion and $10 billion. Mid caps sit between small caps and large caps in both growth potential and stability.
Mid Price — The halfway point between the bid (what buyers offer) and the ask (what sellers want). Traders often try to get filled near the mid price instead of paying the full ask.
Mini (E-mini) Futures — The standard-sized electronic futures contracts on stock indexes, like the E-mini S&P 500 (ES), worth $50 per point. They are the most heavily traded futures in the world, and the micro contracts are their one-tenth-size versions.
Momentum — The tendency of prices that are moving strongly in one direction to keep moving that way for a while. Momentum traders buy what is rising and sell what is falling, following the move rather than fighting it.
Momentum Crash — A sudden, sharp drop in popular momentum stocks — the recent winners everyone piled into — when the trend snaps. Crowded trades unwind fast because everyone tries to exit through the same door.
Money Flow Index (MFI) — An indicator like RSI that also factors in volume, scored from 0 to 100, used to judge whether money is flowing into or out of a stock. Readings above 80 or below 20 are hints about extremes, not guarantees of a reversal.

Money Market Fund — A very conservative fund that holds short-term, low-risk debt and aims to keep its value at $1 per share. Many brokers park your uninvested cash in one automatically.
Moneyness — The relationship between a stock's price and an option's strike price. It describes whether an option is in the money (has real value now), at the money (strike equals the stock price), or out of the money (no real value yet).
Morning Star — A three-candle pattern at the bottom of a downtrend: a strong down candle, a small indecisive candle, then a strong up candle. It suggests sellers are exhausted and buyers are stepping in — a hint, not a promise.
Moving Average — A line on a chart showing the average price over the last set number of candles, like the 20-day or 200-day average. It smooths out the bumps so the main trend is easier to see.
Moving Average Ribbon — A chart display of several moving averages of different lengths fanned out together like ribbons. When the ribbons squeeze together, a trend may be tiring; when they fan out in order, the trend looks strong.
Multi-Leg Order — One order that buys and sells two or more options (or futures) together as a package, like a spread. It makes sure all parts fill together at one combined price.
Multiplier — The number that turns an option's quoted price into its real cost. Stock options have a multiplier of 100, so a $2.50 premium really costs $2.50 × 100 = $250 per contract.
Municipal Bond — A bond issued by a state, city, or local agency to pay for things like roads and schools. Its interest is often exempt from federal income tax, which is why investors in higher tax brackets like them — but lower risk is not no risk.
Mutual Fund — A pooled fund where many investors' money is combined and managed together, priced once per day after the market closes. Unlike ETFs, you cannot trade a mutual fund during the day.

N

Naked Call — A call option sold by someone who does not own the shares behind it. If the stock rockets upward, the seller must buy shares at the high price to deliver them, so the possible loss is unlimited.
Naked Option — An option sold by someone who does not own the shares or the offsetting position behind it. It can lose far more than the price it was sold for, so brokers only allow it for experienced traders with large accounts.
Naked Put — A put option sold without setting aside the cash or holding a hedge to cover it. If the stock crashes, the seller can be forced to buy shares far above their market price, so the loss can be very large.
Narrow Range — A candle or trading day where the distance between the high and the low is small compared to usual. It means buyers and sellers were quiet and in balance, and traders watch for a bigger move once price finally leaves the range.
NASDAQ — A major American stock exchange where shares are bought and sold electronically. Many famous technology companies, like Apple and Microsoft, trade here.
Nasdaq Composite — An index that tracks nearly every stock listed on the NASDAQ exchange — more than 3,000 companies. When news reports say "the Nasdaq rose today," they usually mean this number.
Nasdaq-100 — An index (a numbered scorecard) of 100 of the largest non-bank companies listed on the NASDAQ, mostly technology names. It is the index the popular QQQ fund follows.
National Best Bid and Offer (NBBO) — The highest bid and lowest ask for a stock across all US exchanges at that moment. Rules require brokers to fill your order at this best price or better.
Net Asset Value (NAV) — The value of everything a fund owns, minus what it owes, divided by its shares. It is the per-share worth of a fund, figured out at the end of each trading day for mutual funds.
Net Change — How much a price moved compared to the previous day's closing price. If a stock closed at $50 yesterday and $52 today, its net change is +$2.
Net Credit — When a multi-part options trade (like a spread) puts money into your account when you open it, because you sold more premium than you bought. Credit trades usually profit if price stays put or moves away from the sold options.
Net Debit — When a multi-part options trade costs you money to open, because you bought more premium than you sold. The debit paid is the most a buyer-side spread trade can lose.
Net Delta — All of your positions' deltas added together, showing your total directional exposure in share terms. A net delta of +200 means your account roughly gains or loses what 200 shares would if the stock moves $1.
Net Income — A company's profit after every cost, bill, and tax is paid. If a shop takes in $10,000 and spends $8,000 on everything, its net income is $2,000.
Net Liquidation Value (Net Liq) — The cash value of your whole account if you closed every position right now at current prices. Broker apps show this number as the real-time worth of your account.
Net Worth — Everything you own (cash, accounts, property) minus everything you owe (loans, card balances, debts). It is the single best scorecard of your overall financial health.
Neutral Strategy — A trade designed to profit when price stays in a range instead of running in one direction, such as an iron condor. These trades lose when price makes a big move either way.

New Highs and New Lows — A daily count of stocks reaching their highest or lowest price of the past year (usually 52 weeks). Lots of new highs suggests a strong market; lots of new lows suggests a weak one.
New York Stock Exchange (NYSE) — The largest stock exchange in the United States, based on Wall Street in New York City. Companies like Walmart and Coca-Cola trade here.
News Catalyst — A news event that pushes a stock's price, such as an earnings report, a new product, or a government announcement. Traders watch for catalysts because quiet stocks often start moving when big news hits.
Noise (Market Noise) — The small, random up-and-down wiggle in prices that carries no real information about where price is going. Beginners lose money chasing noise; experienced traders learn to ignore most of it.
Nominal Value — The stated face value of a security, or a dollar figure that has not been adjusted for inflation. A bond's nominal value is the amount printed on it that will be repaid at maturity.
Nonfarm Payrolls (NFP) — A government report, usually released on the first Friday of each month, showing how many jobs the US economy added or lost. It often causes big, fast moves in stocks, futures, and currencies.
Notional Value — The total dollar value a futures contract controls, found by multiplying the contract size by the price. One oil futures contract controls 1,000 barrels, so at $70 a barrel its notional value is $70,000 — far more than the deposit you put down.

O

Odd Lot — An order for fewer than 100 shares of a stock. Buying 25 shares is an odd lot; it still works fine, it is just smaller than the standard block.
Off-Exchange Trading — Buying and selling that happens away from the public exchanges, such as in private venues called dark pools or inside a broker's own system. A large share of US stock trades happen this way, and the prices still must match the public best quotes.
Offer (Ask Price) — The lowest price a seller is currently willing to accept for a stock or contract. When you buy at market, this is roughly the price you pay.
OHLC (Open, High, Low, Close) — The four key prices of any time period: where it started, the highest trade, the lowest trade, and where it ended. Every candle on a chart is drawn from these four numbers.
Omega — An options number that shows an option's effective leverage: roughly how many percent the option's price moves for a 1% move in the stock. High omega means big swings in both directions, so small stock moves can make or wreck the option fast.
On-Balance Volume (OBV) — An indicator that keeps a running total of volume, adding the day's volume when price closes up and subtracting it when price closes down. Traders use it to check whether money is quietly flowing into or out of a stock.
One-Cancels-Other (OCO) Order — Two linked orders where filling one automatically cancels the other. Traders use it to set a profit-taking order and a stop-loss order at the same time, so whichever happens first ends the trade.
Open — The price of the first trade of the day (or of any candle's time period). The word is also a verb — to "open" a position means to start a new trade.

Open Interest — The total number of option or futures contracts that exist right now and have not been closed, exercised, or expired. High open interest means lots of traders are involved in that contract.
Open Interest Change — How much open interest (the number of open contracts) rose or fell over a period. Rising open interest alongside a price move suggests new money is joining that move; falling open interest suggests traders are closing out.
Open Order — An order you have placed that has not filled yet and has not been canceled. A limit order waiting for your price is an open order.
Open Position — Any trade you are still holding. If you own 50 shares of a stock right now, that is an open position until you sell them.
Opening Auction — The short process right at the market open where buy and sell orders are matched together to set one fair opening price. It handles the pile-up of orders placed overnight.
Opening Bell — The bell rung at 9:30 a.m. Eastern Time that starts regular US stock market hours. Prices often move quickly in the first minutes after it rings.
Opening Range — The high and low prices from the first few minutes of the trading day, often the first 5, 15, or 30 minutes. Many day traders watch this range as a map for the rest of the day.
Opportunity Cost — What you give up by putting your money in one trade instead of another. Every dollar parked in a slow trade is a dollar that cannot work somewhere else, so good traders compare choices, not just ideas.
Option — A contract that gives you the right, but not the obligation, to buy or sell a stock at a set price (the strike price) before a set date (the expiration). You pay a fee, called the premium, for that right.
Option Chain — The big price list for a stock's options, showing every strike price and expiration date with the current price of each call and put. Think of it as the menu you order options from.
Option Contract — One single option. A standard stock option contract controls 100 shares, so a premium quoted at $2.50 costs you $250 for one contract.
Option Seller (Writer) — The person on the other side of an option trade, who collects the premium and takes on the obligation if the buyer uses the option. Selling options can bring in income but can carry large risk.
Options Approval — Permission your broker gives you to trade options, granted in levels based on your experience and account. Beginners usually start with basic levels, like buying calls and puts, before spreads or selling options are allowed.
Options Assignment Risk — The risk carried by anyone who has sold options: the buyer can exercise at any time before expiration (on American-style options), suddenly handing the seller shares or taking them away. This risk jumps around dividend dates on short calls.
Options Expiration — The date an option contract ends. If the option has no value by the end of that day, it expires worthless and the buyer loses the premium paid.
Order — An instruction you give your broker to buy or sell. A market order fills right away at the current price, while a limit order only fills at your chosen price or better.
Order Book — The live list of buy and sell orders waiting at different prices for a stock or contract. Traders look at it to see how many buyers and sellers are lined up.
Order Flow — The stream of buy and sell orders coming into the market right now. Watching order flow helps some traders judge whether buyers or sellers are more aggressive at the moment.

Oscillator — A technical indicator that swings back and forth between set bounds, like 0 and 100, to suggest a stock may have risen or fallen too far, too fast. The RSI is the most famous example.
Out-of-Sample Testing — Checking a trading strategy on market data it was NOT built or tuned on. A strategy that only works on the data used to create it will usually fail with real money.
Out-of-the-Money (OTM) — Describes an option with a strike price that is currently on the losing side. A call is out-of-the-money when its strike is above the stock price; a put is out-of-the-money when its strike is below it — such options are cheaper but need a bigger move to pay off.
Outside Bar — A candle whose high is higher and low is lower than the candle before it, completely swallowing the earlier candle's range. It shows a burst of two-sided fighting and often appears near turning points.
Outstanding Shares — The total number of a company's shares that exist and are held by all investors. Multiply this by the share price and you get the company's market cap (total value).
Over-the-Counter (OTC) — Trading that happens away from the big exchanges like the NYSE and NASDAQ, usually in tiny, little-known companies. OTC stocks follow looser rules and are much riskier than exchange-listed stocks.
Overbought — A word traders use when a price has risen a lot in a short time and may be due for a pause or pullback. An RSI reading above 70 is a common overbought signal, but it is a hint, not a guarantee.
Overfitting — Tuning a strategy's rules so precisely to past data that it memorizes random noise instead of real patterns. Overfit strategies look brilliant in backtests and usually fall apart in live trading.
Overnight Risk — The danger of holding a position while the market is closed, when news can break and price can open (gap) far from your stop price. Losses from an overnight gap can be much bigger than the loss you planned.
Overnight Session — Trading that happens outside regular daytime hours. Futures trade nearly around the clock on weekdays, and stocks can trade in pre-market and after-hours sessions with less activity.
Oversold — The opposite of overbought: a price has fallen a lot in a short time and may be due for a bounce. An RSI reading below 30 is a common oversold signal, but prices can keep falling anyway.
Overvalued — When a stock's price looks higher than the underlying business seems to be worth, based on its earnings, sales, or growth. An overvalued stock can be a great company and still be a risky buy at that price.

P

P/E Ratio (Price-to-Earnings) — A popular way to judge whether a stock is cheap or expensive: share price divided by the company's yearly profit per share. A $100 stock earning $5 per share has a P/E of 20, meaning buyers pay $20 for each $1 of yearly profit.
Panic Selling — When frightened investors all rush to sell at once, pushing prices down fast. It often happens after bad news and can make prices drop far below what a company is really worth.
Paper Trading — Practicing with a pretend-money account that uses real market prices. It lets you learn how orders, options, and futures work without risking a single real dollar.
Par Value — The face value printed on a bond or stock certificate — the amount a bond promises to pay back at the end. US bonds are commonly issued with a par value of $1,000.

Parabolic Move — When a price rises faster and faster, curving steeply upward like a rocket launch. These moves feel exciting but usually end with a sudden, sharp drop, because the buying feeding them cannot last.
Partial Fill — When only part of your order gets completed because there were not enough buyers or sellers at your price. If you ordered 200 shares and only 120 traded, you got a partial fill.
Passive Investing — Buying broad funds that simply track an index and holding them for the long term, instead of picking stocks or timing trades. It is low-cost, low-effort, and beats most active traders over long periods.
Pattern (Chart Pattern) — A shape that price repeatedly draws on a chart, such as a triangle or a flag, that traders watch for clues about what might happen next. Patterns can help plan trades, but none of them work every time.
Pattern Day Trader (PDT) — A label for someone who makes four or more day trades within five business days in a margin account. Under the classic US rule, pattern day traders must keep at least $25,000 in account equity — but US regulators have been replacing this rule with new intraday-margin standards and brokers are transitioning, so check your own broker's current rule before relying on either version.
Payout Ratio — The share of a company's profits that it pays out to shareholders as dividends. If a company earns $4 per share and pays a $1 dividend, its payout ratio is 25%; a ratio near or above 100% can mean the dividend is in danger.
PEG Ratio — A stock's P/E ratio divided by its expected earnings growth rate, meant to judge price against growth instead of current profit alone. A PEG near 1 is often called fairly valued, but it is a rough rule of thumb, not a fact.
Penny Stock — A stock trading under $5 per share, usually from a very small company. Penny stocks can swing wildly, are hard to sell quickly, and are a favorite target of scams, so beginners should be extremely careful.
Performance Chasing — Buying whatever has just gone up a lot (or jumping into last year's winning fund) and selling whatever has fallen. It feels sensible but usually means buying high and selling low, arriving after most of the move is over.
Pin Risk — The uncertainty when a stock closes almost exactly at an option's strike price on expiration day. The option seller cannot be sure whether they will be assigned, which makes planning the following Monday's position difficult.
Pip — The smallest standard price step in currency (forex) trading, usually the fourth decimal place. If EUR/USD moves from 1.0850 to 1.0851, it moved one pip.
Pivot Point — A price level worked out from the previous day's high, low, and close that traders use as a possible turning point. Prices often stall or reverse near pivot points, so many traders mark them on their charts.
Point (Futures) — A full 1.00 move in a futures price. Its cash value depends on the contract: on the E-mini S&P 500 (ES) one point is worth $50, while on the Micro version (MES) one point is worth $5.
Portfolio — Everything you own across your investment accounts — all your stocks, funds, options, and cash combined. Looking at your portfolio means looking at the whole picture, not just one trade.
Portfolio Margin — A risk-based margin system for large, experienced accounts (usually $100,000 or more) that calculates required margin from the whole portfolio's combined risk instead of fixed percentages. It allows much more leverage, which means losses can grow much faster too.
Position — One holding or trade you currently have open, like 100 shares of a stock or two option contracts. Traders say "I have a position in Apple" to mean they are in that trade right now.
Position Delta — The total delta of one position, found by multiplying the option's delta by the number of contracts and the 100 shares each controls. It tells you how many shares' worth of up-or-down exposure that position gives you.
Position Sizing — Deciding how much money to put into each trade before you enter it. Good position sizing makes sure one bad trade can never wipe out your account.
Position Trading — A longer-term style of trading that holds positions for weeks to months, riding major trends rather than daily swings. Position traders use daily and weekly charts and ignore most day-to-day noise.
Post-Market Trading — Trading after the regular 4:00 p.m. Eastern close, also called after-hours. Fewer traders participate, so prices can jump around more and orders can fill at worse prices than during the day.
Pre-Market Trading — Trading that happens before the regular 9:30 a.m. Eastern open, available through most brokers. Prices can jump on overnight news, but fewer traders are active, so moves can be jumpy.
Premium — The price you pay to buy an option, quoted per share. Since one contract covers 100 shares, a $2.50 premium costs $250 per contract — and for a buyer, that $250 is the most you can lose on the trade.
Premium Decay — The steady loss of an option's time value (extrinsic value) as expiration gets closer, driven by theta. Premium decay works against option buyers every single day and in favor of option sellers.
Price Action — Reading the movement of price itself — the candles, trends, and support and resistance levels on a chart — instead of relying on indicators. It is the skill of watching what price is actually doing, bar by bar.
Price Discovery — The process by which buyers and sellers, through their competing orders, find the price where trades actually happen. It is the market doing its main job: deciding what something is worth right now.
Price Improvement — When your broker fills your order at a better price than the one publicly quoted. Even a few cents of price improvement per share adds up over many trades.
Price Limit (Limit Up / Limit Down) — The maximum move a futures contract is allowed in one day, set by the exchange. When price hits the limit it can lock there with trading nearly stopped, which can trap traders in a losing position.
Price Target — The future price an analyst predicts a stock will reach, usually within about a year. It is an educated opinion, not a promise — analysts are often wrong.
Primary Market — Where brand-new securities are sold for the very first time, like a company selling shares to the public in an IPO. Money paid here goes to the company itself, not to another investor.
Principal — The original amount of money you invested or borrowed, before any gains, losses, or interest. Protecting your principal means first making sure the base amount survives.
Private Placement — A sale of shares directly to a small group of chosen investors instead of to the public on an exchange. These shares usually cannot be resold easily and are risky, so they are normally limited to wealthy, experienced investors.
Profit and Loss (P&L) — The total amount of money you have made or lost. A gain or loss is "realized" once you sell and lock it in; before that it is "unrealized" — just on paper, and it can still change.
Profit Factor — A score for a set of trades: total gross profits divided by total gross losses. Above 1.0 means the trades made more than they lost before costs; many traders look for 1.5 or better, and it says nothing by itself about how bumpy the ride was.
Profit Margin — The share of a company's sales it keeps as profit after costs. If a company sells $100 of goods and keeps $10 as profit, its profit margin is 10%.
Profit Target — A price or profit level you choose in advance where you plan to sell and take your winnings. Setting a profit target before entering stops greed from making your decisions mid-trade.
Protective Put — A put option bought by someone who owns the stock, as insurance. If the stock falls hard, the put gains value and cushions the loss, like a seatbelt for your shares.
Public Company — A company whose shares are sold to the general public on a stock exchange, so anyone can buy a piece of it. Apple and Walmart are public companies; your local family restaurant is not.
Pullback — A temporary dip in price during an overall uptrend, like a short rest during a climb. Traders often wait for a pullback to buy at a slightly better price.
Pump and Dump — A scam where promoters hype up a cheap stock so the price rises ("pump"), then sell their own shares at the top and leave everyone else holding the crash ("dump"). It is illegal and mainly targets beginners — avoid any stock being pushed by strangers online.
Put Option — A contract giving you the right to sell 100 shares at the strike price before expiration. Puts generally gain value when the stock falls; for example, a $50 put bought for $2.00 breaks even at $48 at expiration.
Put Wall — A strike price holding an unusually large amount of put open interest, which some traders believe can act like support because of dealer hedging flows. It is a positioning gauge to be aware of, never a guarantee that price will stop there.
Put/Call Ratio — The number of put options traded compared to calls in a market or stock. A high ratio means traders are buying more downside protection (fear); a low ratio suggests more optimism.
Pyramiding — Adding more size to a position that is already winning, in steps. Done carelessly it raises your average cost so much that one normal pullback can turn a winner into a loser, so it needs a written plan.

Q

QQQ — The ticker symbol of a hugely popular fund (ETF) that tracks the Nasdaq-100 index. Buying one share of QQQ is like buying a small slice of 100 big Nasdaq companies at once.
Quadruple Witching — A day, four times a year (the third Friday of March, June, September, and December), when several kinds of options and futures contracts expire at the same time. These days often bring extra trading volume and sharper price swings.
Quantitative Easing (QE) — When the US central bank (the Federal Reserve) buys large amounts of bonds to pump money into the financial system and push interest rates down. It is meant to encourage borrowing and spending, and markets often rise while it runs.

Quantitative Tightening (QT) — When the Federal Reserve shrinks its balance sheet by letting bonds it owns mature without replacing them, slowly pulling money out of the financial system. It is the opposite of quantitative easing and tends to pressure asset prices.
Quantitative Trading — Trading driven by mathematical models and computer programs that follow fixed rules instead of human judgment in the moment. It ranges from simple rule-based systems to huge funds trading in fractions of a second.
Quarterly Earnings Report — A report card every public company must publish about every three months, showing its sales and profits. Stock prices can jump or drop sharply in the hours after one is released.
Quick Ratio — A simple check of whether a company could pay its near-term bills using only its most easily-sold assets, like cash. A ratio above 1 means it has more quick assets than short-term debts.
Quote — The current prices being offered for a stock or contract: the bid (what buyers will pay) and the ask (what sellers want). When you "get a quote," you are seeing those live numbers.
Quote Currency — In a currency pair, the second currency listed — the one the price is stated in. In EUR/USD at 1.08, the US dollar is the quote currency: one euro costs 1.08 dollars.
Quote Stuffing — Flooding the market with a huge number of orders that are canceled almost instantly. Regulators have accused some high-speed trading firms of using it to slow or confuse competitors; it is hard to prove, and ordinary traders cannot do it from a normal brokerage account.

R

Rally — A strong rise in a price over hours, days, or weeks. After weeks of falling, a market that climbs steadily for several days is said to be rallying.
Range — The distance between a price's high and its low over a period, or the zone a price keeps bouncing inside, between support below and resistance above. A stock trapped between $90 and $100 is "trading in a range."
Range-Bound — Describes a price stuck moving sideways between a clear ceiling (resistance) and floor (support), with no real trend. Strategies that work in trends usually bleed money in range-bound markets, and the opposite is also true.
Rate Hike and Rate Cut — When the Federal Reserve raises (hike) or lowers (cut) its main target interest rate. Hikes make borrowing more expensive and often pressure stocks; cuts do the opposite.
Rate of Change (ROC) — An indicator that measures how much price has changed over a set number of periods, shown as a percentage. It is a simple momentum gauge: strongly positive values mean price has climbed fast, strongly negative values mean it has fallen fast.
Ratio Spread — An options trade that buys a certain number of options and sells a larger number of further-out options at the same time. It can be opened cheaply, but the extra sold options leave part of the trade with undefined, potentially large risk.
Real-Time Quote — A price that is live right now, with no delay. Some free websites and apps show prices delayed by 15 minutes or more, which is too slow for active trading.
Realized Gain or Loss — A profit or loss that is final because you have closed the trade. If you buy at $40 and sell at $46, your $6-per-share gain is realized — it is yours to keep.
Realized Volatility — How much a price actually moved around over a past period, measured from real price history. Traders compare it with implied volatility (what options are pricing in) to judge whether options look expensive or cheap.
Rebalancing — Adjusting your portfolio back to your planned mix after prices move. If your plan was 60% stocks and 40% bonds and stocks grew to 70%, rebalancing means selling some stocks and buying bonds to restore the mix.
Recession — A period when the overall economy shrinks and business slows down, often described as two quarters (six months) in a row of falling economic output. Jobs get harder to find, company profits fall, and stock markets usually struggle.
Record Date — The deadline date set by a company: you must officially own the shares by this date to receive the upcoming dividend. Buy after the record date and the dividend goes to the previous owner instead.
Regular Trading Hours (RTH) — The main US stock market session: 9:30 a.m. to 4:00 p.m. Eastern Time, Monday through Friday, excluding holidays. This is when trading is busiest and prices are most reliable.
Regulation T (Reg T) — The US rule that lets a broker lend you up to 50% of the purchase price when you first buy stock in a margin account. Buy $10,000 of stock and you must put up at least $5,000 of your own money at the start.
Relative Strength — How a stock's price performance compares to a benchmark index over a period — not to be confused with the RSI indicator. A stock up 15% while the S&P 500 is up 5% shows strong relative strength.
Relative Strength Index (RSI) — A popular indicator that scores recent price momentum from 0 to 100. Readings above 70 suggest a stock may be overbought, and readings below 30 suggest it may be oversold — signals to pay attention, never guarantees.
Relative Volume (RVOL) — A stock's trading volume compared to its own average volume for that same time of day. An RVOL of 3 means it has traded three times its usual amount, which usually signals news or unusual interest.
Resistance — A price level where a rising stock keeps getting pushed back down, like a ceiling. If a stock fails to get past $100 three times, traders call $100 resistance.
Retracement — A partial move back against the main trend. If a stock climbs from $100 to $120 and then slips to $110, it has retraced half of the move — traders watch these pullbacks for chances to join the trend.
Return — The gain or loss on your money, usually shown as a percentage. Making $100 on a $1,000 investment is a 10% return.
Return of Capital — A payment from a fund or company that hands investors back part of their own invested money rather than paying from profits. It is not earnings — receiving it lowers what the investment itself still holds.
Revenue — The total money a company takes in from selling its products or services, before subtracting any costs. It is also called sales or the "top line" because it sits at the top of the financial report.
Reversal — When a price trend changes direction — an uptrend ends and prices start falling, or a downtrend ends and prices start rising. Catching the exact moment of a reversal is one of the hardest things in trading.
Reward-to-Risk Ratio — A comparison of how much you could make on a trade versus how much you could lose, worked out before you enter. Risking $100 to aim for $300 is a 3-to-1 reward-to-risk ratio.

Rho — The Greek that measures how much an option's price changes when interest rates move — roughly, the price change for a 1 percentage-point rate shift. It matters most for long-dated options and is usually the least important Greek for short-term trades.
Rights Offering (Rights) — When a company gives existing shareholders short-lived "rights" to buy new shares, usually at a discount, in proportion to what they already own. Rights can often be sold if you do not want to use them, but they expire quickly.
Risk — The chance that you will lose money on a trade or investment. Every trade has risk; the goal of learning is not to remove it, but to control how much of it you take.
Risk Capital — Money set aside for trading or speculation that you can afford to lose completely without harming your housing, bills, or family's security. Trading with anything other than risk capital is how people get hurt.
Risk Graph — A chart your broker draws showing a position's estimated profit or loss at many different stock prices, often for today and for expiration day. It is the fastest way to see where a trade wins, where it loses, and its worst case.
Risk Management — The set of habits and rules that protect your account: sizing positions small, using stop losses, and never betting too much on one idea. It is the main skill that separates long-lasting traders from gamblers.
Risk Tolerance — How much loss and how big a price swing you can handle, both in your wallet and in your stomach. A person who cannot sleep when their account drops 10% has a low risk tolerance and should trade smaller.
Risk-Adjusted Return — A way of judging performance that weighs how much risk was taken to earn a return, instead of looking at profit alone. A strategy making 10% with small, calm swings is genuinely better than one making 10% with terrifying drops, even though the headline numbers match.
Risk-On / Risk-Off — A quick way to describe the market's mood. "Risk-on" means investors feel brave and buy stocks and other growth assets; "risk-off" means they feel cautious and move toward safer assets like cash and bonds.
Role Reversal (Polarity) — The principle that a price level often flips its job after it breaks: support that gives way tends to become resistance on the way back up, and broken resistance tends to become support. Traders watch old levels for exactly this flip.
Roll (Rolling a Position) — Closing a contract that is about to expire and opening the same kind of position in a later expiration, to keep the trade going. Futures traders roll to the next month's contract, and option traders roll to a later date (and sometimes a different strike).
Rotation (Sector Rotation) — When big investors move money out of one group of stocks and into another — for example, out of technology and into energy. Watching rotation shows where money is flowing across the market.
Round Lot — The standard block of 100 shares of a stock. Prices are often quoted and big orders filled in round lots, though today anyone can buy even a single share.
Round Trip — One complete trade: opening a position and closing it again. Buying a stock on Monday and selling it on Tuesday is one round trip.
RSI Divergence — When price and the RSI indicator disagree — for example, price makes a new high but RSI makes a lower high. It warns that momentum is tiring, but it is a caution sign, not a guarantee of reversal, and prices can diverge for a long time.

Rule-Based Trading — Making every entry, exit, and size decision from rules written down in advance, instead of feelings in the moment. It is the foundation of both disciplined manual trading and automated systems.

S

S&P 500 — A list of 500 of the biggest companies in the United States, tracked as one number that goes up and down. When people say "the market went up today," they often mean this list went up.
Scalping — A very fast style of trading where you buy and sell within minutes, or even seconds, trying to grab tiny profits many times a day. It is fast, stressful, and hard for beginners.
Scenario Analysis — Thinking through "what happens to my trade if price goes up, down, or nowhere" before you enter, instead of only imagining the win. Good traders plan for all three outcomes, not just the one they want.
Seasonality — The idea that prices sometimes follow patterns tied to the time of year, like certain months often being stronger than others. It is a tendency, not a guarantee.
SEC (Securities and Exchange Commission) — The United States government agency that polices the markets. It makes the rules public companies and brokers must follow and punishes fraud.
Secondary Market — The market where regular people buy and sell stocks to each other after the shares first exist. Almost everything you will ever trade happens here, on exchanges like the New York Stock Exchange and Nasdaq.
Secondary Offering — When a company sells more new shares after it is already public. It raises cash for the company but can push the price down because there are now more shares sharing the same company.
Sector — A group of companies that do similar business, like technology, healthcare, energy, or banks. Traders watch sectors because stocks in the same sector often move together.
Sector Rotation — When big investors move money from one sector into another as the economy changes. For example, money might leave technology stocks and flow into energy stocks.
Secular Trend — A very long trend that lasts for years, like a decade-long rise in technology stocks. It is much bigger and slower than the day-to-day trends most traders watch.
Securities — A general word for tradable financial assets: stocks, bonds, options, and similar products. If you can buy and sell it on a market, it is probably a security.
Sell the News — When a stock falls right after good news comes out, because traders who bought early sell to lock in profits. It is the flip side of "buy the rumor, sell the news."
Sell to Close — An order that sells an option you already own, ending that position. If you bought a call for $200 and sell to close at $300, you keep the $100 difference minus fees.
Sell to Open — An order that creates a brand-new short option position by selling an option you do not own yet. You collect money (the premium) up front but take on an obligation, which can be risky.
Sell-Off — A sudden wave of selling that pushes prices down quickly. It often happens when bad news scares many holders into selling at the same time.
Session (Trading Session) — One full day of trading. For US stocks, the regular session runs 9:30 AM to 4:00 PM Eastern Time.
Settlement — The final step of a trade, when the money and the shares officially change hands and become fully yours. Buying a stock feels instant, but settlement happens behind the scenes a little later.
Settlement Date — The day a trade is officially finished and the cash or shares actually change hands. For most US stock trades this is T+1 — one business day after the trade date.

Settlement Price — The official closing price a futures exchange sets at the end of each day. Your futures account gains and losses are calculated from this price.
Settlement, Cash — How index options like SPX finish: no shares change hands, the winner simply receives the cash difference. This is why you never get assigned shares from an SPX option.
Settlement, Physical — How most stock options finish: the actual shares are delivered and paid for when the option is exercised. This is the normal way stock and ETF options settle.
Shakeout — A sharp, quick drop that scares nervous holders into selling, right before price recovers. Shakeouts punish traders who place their stop losses in the most obvious spots.
Share — One small unit of ownership in a company. If a company has 1,000 shares and you own 10, you own 1% of that company.
Share Class — Some companies sell different types of shares, often called Class A and Class B. They may carry different voting power even though they represent ownership in the same company.
Share Price — The cost of one single share of a stock at a given moment. If a stock shows $50, that is the price for one share, not the whole company.
Shares Outstanding — The total number of shares of a company that exist and are held by everyone. Multiply this by the share price and you get the company's total market value (market cap).
Sharpe Ratio — A score that measures how much return a trader or fund earned for the amount of ups and downs they took to get it. Higher is smoother; a big return with wild swings can score worse than a smaller, steadier one.
Short Covering — Buying back shares you previously sold short, which closes your short position. If many short sellers cover at once, the rush of buying can push the price up fast.
Short Float — The percentage of a stock's available shares (its float) that have been sold short. A very high short float means many traders are betting against the stock — and it can fuel a squeeze if they all rush to exit.
Short Interest — The total number of a stock's shares that have been sold short and not yet bought back. High short interest means many traders are betting the price will fall.
Short Position — A position that profits when a price goes down and loses when it goes up. You can be short by selling shares you borrowed, or by holding options that gain when price falls.
Short Selling — Borrowing shares from your broker, selling them at today's price, and hoping to buy them back cheaper later to return them. If the price rises instead, losses can keep growing with no limit.
Short Squeeze — When a heavily shorted stock jumps in price and short sellers rush to buy back shares to stop their losses. That extra buying pushes the price even higher, very fast.
Side — Which side of a trade you are on: the buy side or the sell side. Every trade has both — for you to buy, someone else has to sell.
Sideways Market — A market that drifts up and down inside a range without a clear direction. Prices move, but they do not really go anywhere over time.
Signal — A clue from a chart, indicator, or strategy that suggests it might be time to act, like a moving average crossover. A signal is a hint to check your plan, never a guarantee or an order to trade.
Simple Moving Average (SMA) — A line on a chart that averages a stock's price over a set number of days, like the last 50 days. It smooths out daily wiggles so the bigger trend is easier to see.

Size (Position Size) — How many shares or contracts you trade in one position. Size is what turns a small price move into a small loss or a disaster — it is the most important risk decision you make.
Skew (Options Skew) — The pattern where options at different strike prices carry different implied volatility, usually with puts priced richer than calls. It shows traders are paying up more for downside protection than for upside bets.
Slippage — The small difference between the price you expected and the price your order actually filled at. It happens most when prices move fast or few people are trading.
Small-Cap Stock — A stock of a smaller company, usually worth between about $300 million and $2 billion in total. Small-caps can grow fast but tend to swing more and are riskier than big-company stocks.
Smart Money — A nickname for big professional investors like funds and institutions, whose moves traders try to follow. Be careful: nobody can see their full picture, and plenty of "smart money" trades lose too.
Smoothing — Using an average to flatten out jagged price or data lines so the trend is easier to see, the way a moving average smooths daily prices. Smoothing makes charts calmer but also slower to react.
Social Sentiment — The overall mood about a stock on social media and forums — bullish, bearish, or panicked. It can move small stocks fast, and it is one of the easiest things for promoters to fake.
Soft Stop — A stop loss you keep in your head instead of entering it as a real order with your broker. It only works if you are watching and actually act — many beginners freeze, which is how mental stops become huge losses.
Speculation — Buying something mainly because you hope its price moves your way soon, accepting a real chance of losing money. It is different from long-term investing, and most trading is speculation.
Spike — A sudden, sharp move up or down that looks like a thin spike on the chart, often caused by news or a burst of orders. Spikes frequently reverse just as fast, so chasing them is risky.
Spin-Off — When a company splits off one of its divisions into a brand-new, separate public company, and existing shareholders receive shares of the new one. Example: a big company spinning off its streaming division into its own stock.
Split-Adjusted — A past price that has been recalculated to account for a stock split, so old and new prices can be compared fairly. Without adjusting, a chart would show a fake crash on the split day.
Spot Price — The price of something right now, for immediate delivery. When a news report names the price of gold or oil, that is the spot price.
Spread — Most often, the small gap between the highest price a buyer offers (the bid) and the lowest price a seller accepts (the ask). It can also mean a trade built from two or more options at the same time.
Squeeze — Any situation where traders caught on the wrong side rush to exit at once, pushing price even harder against them. Short squeezes are the famous kind, but long squeezes happen on the way down too.
Stagflation — A nasty mix of slow economic growth and high inflation at the same time. It is hard on stocks because the economy is weak while prices keep rising.
Standard Deviation — A math measure of how much prices usually swing around their average. A bigger number means wilder, jumpier price movement.
Stock — A piece of ownership in a company. When you buy a stock, you own a small slice of that business and your money rises or falls with it.

Stock Buyback — When a company uses its own cash to buy its shares back from the market. Fewer shares remain, so each remaining share represents a slightly bigger slice of the company.
Stock Dividend — A dividend paid in extra shares instead of cash. If you own 100 shares and get a 5% stock dividend, you receive 5 more shares.
Stock Exchange — An organized marketplace where stocks and other securities are bought and sold, like the New York Stock Exchange (NYSE) and Nasdaq. Exchanges enforce rules so trading is fair and orderly.
Stock Index — A number that tracks the combined performance of a chosen group of stocks, like the S&P 500 or the Nasdaq-100. You cannot buy an index directly; you trade funds, futures, or options based on it.
Stock Market — The whole system of exchanges and networks where company shares are bought and sold. It is where businesses raise money and everyday people invest.
Stock Quote — The latest price information for a stock: its last trade price, the current bid and ask, and how much it has moved today. Your broker app shows quotes all day long.
Stock Screener — A search tool that filters thousands of stocks by rules you pick, like price, size, or how much they moved today. It helps you find candidates instead of scrolling everything.
Stock Split — When a company cuts each share into several cheaper shares. In a 2-for-1 split, your 10 shares at $100 become 20 shares at $50 — you own the same total value.
Stop Hunting — When price briefly pushes past a level where many stop orders sit, triggering them, then reverses. It is one reason beginners sometimes get stopped out right before price goes their way.
Stop Order (Stop Loss) — An order that sits waiting until price reaches your chosen level, then becomes a market order to get you out. Traders use it to cap a loss — for example, sell automatically if a $50 stock falls to $45.
Stop-Limit Order — An order that becomes a limit order once price reaches your stop price. It protects you from a terrible fill price, but if price jumps past your limit, the order may never fill at all.
Straddle — An options trade that buys a call and a put at the same strike price and expiration. It profits if the stock makes a big move in either direction, and loses if price stays quiet.
Strangle — Like a straddle, but the call and put have different strike prices, usually a put below the current price and a call above it. It costs less than a straddle but needs an even bigger move to profit.
Street Name — When your shares are officially registered under your broker's name, even though they belong to you. This is how nearly all brokerage accounts hold stock — it is normal and your ownership is still recorded.
Strike Price — The fixed price written into an option contract. A call's strike is the price you may buy the stock at; a put's strike is the price you may sell it at.
Strike Selection — The skill of choosing which strike price to trade on an option — closer strikes cost more but move more like the stock; farther strikes are cheaper but expire worthless far more often. Cheap is not the same as good value.
Suitability — The rule that a broker should only recommend or allow strategies that fit a customer's experience, finances, and risk tolerance. It is why brokers ask questions and set approval levels before letting you trade advanced strategies.
Supertrend — A popular indicator that draws a line above or below price to show the trend and suggest trailing stop levels. Like every indicator, it lags and whipsaws in choppy markets — it is a guide, not a promise.
Supply and Demand — The basic engine of every price: more eager buyers than sellers pushes price up, and more eager sellers than buyers pushes it down. Every chart move comes back to this.
Supply Zone — An area on a chart where heavy selling pushed price down hard before, and where sellers may step in again. Traders watch supply zones overhead the way they watch support below.
Support — A price area where a falling stock has tended to stop and bounce, like a floor. Buyers have stepped in there before, so traders watch to see if they do it again.
Support Flip — When an old resistance level that price finally breaks above turns into support on the way back down. Levels often swap jobs once they are broken — traders call this role reversal.
Survivorship Bias — The trap of only seeing the winners that survived — like judging a strategy by the stocks still trading today while ignoring all the ones that failed and disappeared. It makes the past look easier and safer than it really was.
Swap — A private contract where two parties exchange cash flows, such as swapping a fixed interest rate for a floating one. Swaps are mostly an institutional tool; beginners will mainly hear about them in news about big banks.
Swing High — A peak on a chart where price rose, then turned down, leaving a clear high point with lower prices on both sides. Swing highs mark where sellers last took control.
Swing Low — A valley on a chart where price fell, then turned up, leaving a clear low point with higher prices on both sides. Traders often place stop losses just below important swing lows.
Swing Trading — A style of trading that holds positions for a few days to a few weeks, aiming to catch a medium-sized move. It is slower than day trading and does not require watching the screen all day.
Symbol (Ticker) — The short code that identifies a stock or fund, like AAPL for Apple or SPY for a popular S&P 500 fund. You type the symbol into your broker app to find and trade it.
Systematic Trading — Trading by a completely written set of rules — often run or checked by a computer — with no gut-feel decisions. The opposite of discretionary trading, where the trader decides in the moment.

T

T+1 Settlement — The current US rule (since May 2024) that stock trades officially settle one business day after the trade. Sell a stock on Monday, and the cash is fully settled on Tuesday.
Take Profit — Deciding in advance the price at which you will sell and lock in a gain. Many traders place a take-profit order so the exit happens automatically instead of getting greedy.
Takeover — When one company buys control of another company. The target company's stock often jumps because the buyer usually pays more than the current price.
Tape Reading — Watching the live stream of actual trades — prices, sizes, and speed — to judge whether buyers or sellers are stronger right now. It is one of the oldest skills in trading.
Target Price — The price level where you plan for a trade to reach, or a price an analyst publishes as their estimate of a stock's value. It is a goal or opinion, never a promise.
Tax Lot — A specific batch of shares you bought at one time and price, which the IRS tracks separately for taxes. When you sell, which lot you sell can change how much tax you owe.

Tax-Loss Harvesting — Selling a losing position on purpose near year-end so the loss can lower your taxes, while staying invested in something similar. Tax rules here are tricky, so this is educational only — talk to a tax professional.
Technical Analysis — Studying price charts and trading volume to make trading decisions, instead of studying the company's business. It assumes past price patterns and trends can help time entries and exits.
Technical Default — When a borrower breaks a rule in its loan agreement — like a debt limit — even if it is still making its payments. It can trigger penalties or demands for repayment and is an early warning sign for bondholders.
Theta — A measure of how much value an option loses each day just because time is passing. If an option's theta is −0.05, it loses about $5 per contract per day, all else equal.
Theta Decay Curve — The pattern showing how an option's time value melts slowly at first, then faster and faster as expiration approaches. The last few days are where decay hits hardest — brutal for option buyers, helpful for sellers.
Thin Market — A market or stock with very few buyers and sellers active. Prices can jump around on small orders, spreads get wide, and getting in or out at a fair price is harder.
Tick — The smallest amount a price is allowed to move. For most stocks one tick is one cent; for futures it varies by product, such as 0.25 points on the ES.
Tick Chart — A chart that draws a new candle after a set number of trades (ticks) instead of after a set amount of time. Fast markets produce candles quickly; quiet markets produce them slowly.
TICK Index — A gauge that shows, at this moment, how many NYSE stocks are ticking up minus how many are ticking down. It is a mood meter for the whole market — a gauge to glance at, not a signal to buy or sell by itself.
Tick Value — The dollar value of one tick in a futures contract. On the ES, one tick (0.25 points) is worth $12.50 per contract; on the smaller MES it is $1.25.
Tight Market — A market with a very narrow bid-ask spread and lots of orders, where you can trade quickly with little cost. The opposite of a wide market; big, popular stocks are usually tight.
Time and Sales — A live feed showing every trade as it happens: price, number of shares or contracts, and time. It is the raw data tape readers watch.
Time Decay — The daily shrinking of an option's time value as expiration gets closer. It speeds up in the final days, which is why bought options can melt away even when the stock barely moves.
Time Frame Alignment — Checking that the trend agrees across several chart time frames — for example, the daily and hourly charts both pointing up. Trades taken with the bigger trend tend to fight less headwind.
Time in Force — The instruction telling your broker how long an order stays active: DAY means it cancels at the close if unfilled, and GTC (Good 'Til Canceled) means it stays working until you cancel it or it fills. Always check this before assuming an old order is gone.
Time Value — The part of an option's price that comes from time remaining and the chance of a big move, rather than from the stock's current price. A $60 call on a $55 stock trading at $2 is all time value.
Timeframe — The amount of time each candle or data point on your chart represents, like 1 minute, 1 hour, or 1 day. Day traders use short timeframes; investors use daily and weekly ones.

Top Line — A company's total sales (revenue), the first line on its earnings report. The "bottom line" is what is left as profit after all costs.
Total Return — Everything you earn from an investment combined: price gains plus dividends or interest. A stock up 5% that also paid a 2% dividend gave a total return of about 7%.
Trade Confirmation — The official record your broker sends after a trade, showing what you bought or sold, the price, and the fees. Always check it to make sure the trade matches what you intended.
Trade Date — The day a trade actually happens. This is different from the settlement date, which is when the money and shares officially change hands.
Trade Journal — A notebook or spreadsheet where you record every trade: why you entered, where you exited, and what you learned. Reviewing it is one of the fastest ways for beginners to improve.
Trade Location — Where your entry sits relative to nearby support and resistance. Buying right at support is a good location; buying in the middle of nowhere, far from any level, is a poor one — even for the same setup.
Trade Management — Everything you do after entering: moving stops, taking partial profits, adding, or getting out early. Many traders have fine entries and still lose money through sloppy management.
Trader — A person who buys and sells in the markets, usually aiming for shorter-term moves than an investor. Traders can trade stocks, options, futures, and more.
Trading Halt — A temporary pause in trading of a stock or the whole market, ordered by the exchange. Halts happen during extreme moves or while important news is released.
Trading Plan — A written set of rules you decide before trading: what you trade, when you enter, how much you risk, and when you exit. A plan keeps emotions from running your money.
Trading Psychology — How emotions like fear, greed, hope, and revenge affect trading decisions. Managing your mindset is often harder than learning the charts.
Trading Range — The space between a high price (resistance) and a low price (support) where a stock keeps bouncing back and forth. Traders say a stock is "range-bound" while it stays inside.
Trailing Stop — A stop order that follows the price as it rises, staying a set distance below it. If a stock climbs from $50 to $60, a $5 trailing stop rises to $55, locking in gains if price falls.
Trailing Twelve Months (TTM) — Numbers measured over the most recent 12 months, like a company's revenue for the last four reported quarters. It gives an up-to-date picture instead of using one calendar year.
Transaction Cost — The total cost of making a trade: commissions, fees, the bid-ask spread, and slippage combined. Frequent traders can bleed more to costs than they realize.
Trend — The general direction a price is moving over time: up, down, or sideways. Many traders try to trade in the same direction as the trend rather than fighting it.
Trend Day — A session where price moves mostly one direction from open to close with only small pullbacks. Trend days reward holding with the move and punish traders who keep fading it.
Trend Exhaustion — The point where a trend runs out of energy — moves get smaller, momentum fades, and price stalls. Exhaustion warns a move may be ending, but calling the exact top or bottom is still a guess.
Trend Following — A strategy of jumping on established trends and riding them as long as they last, exiting when the trend breaks. It accepts many small losses to catch a few big moves.

Trendline — A straight line drawn on a chart connecting a series of highs or lows. It helps you see the trend and spot where price might bounce or break through.
Triple Bottom — A chart pattern where price falls to the same low area three times and bounces each time. Three failed attempts to break lower suggest buyers are defending that level.
Triple Top — A chart pattern where price rises to the same high area three times and fails each time. Three failed attempts to break higher suggest sellers are defending that level.
True Range — A measure of how much a candle really moved, including any gap from the previous close. It is the building block of the ATR indicator used to size stops.
Two-Sided Market — A market where buyers and sellers are both active, with real bids and offers on both sides. Market makers are required to provide this so you can always trade.

U

Uncovered (Naked) Option — An option sold without owning protection against it, like selling a call without owning the stock. Losses can be huge or even unlimited, so brokers restrict this and beginners should avoid it.
Underlying — The thing an option or future is based on. For an Apple call option, the underlying is Apple stock; for S&P 500 futures, it is the S&P 500 index.
Underperform — To do worse than a comparison point, usually the overall market. If your stock rose 2% while the S&P 500 rose 8%, your stock underperformed.
Underweight — An analyst's way of saying they expect a stock to do worse than average, so investors might own less of it than usual. The opposite opinion is called overweight.
Underwriter — A bank that helps a company sell new shares to the public, such as during an IPO (a company's first public stock sale). The underwriter organizes the sale and helps set the starting price.
Unlimited Risk — A position where there is no cap on how much money you can lose. Selling stock short or selling a naked call carries unlimited risk because prices can rise without any ceiling.
Unrealized Gain or Loss — The profit or loss on a position you still hold, measured at today's prices. It only becomes real (realized) when you sell and lock it in.
Unwind — To close out a position or a complicated trade completely, often piece by piece. Headlines about a fund "unwinding" a big position mean it is exiting, which can move prices.
Upside — The potential for a price to rise, or the amount it might gain. If a stock at $40 could reasonably reach $50, traders say it has $10 of upside.
Uptick — A trade that happens at a price slightly higher than the trade just before it. A series of upticks shows buyers are actively pushing price up.
Uptick Rule — A market rule (SEC Rule 201) that limits short selling on a stock that has fallen 10% or more in one day: short sales must then be priced above the current best bid. It exists to slow down pile-on selling in a crashing stock.
Uptrend — A pattern where prices keep making higher highs and higher lows over time. It is the chart's way of showing buyers are in control.

V

Valuation — The process of estimating what a company or asset is actually worth. Investors compare that estimate to the current price to decide if something looks cheap or expensive.

Value Stock — A stock that looks cheap compared to the company's earnings, assets, or sales. Value investors buy these hoping the market eventually prices them fairly.
Value Trap — A stock that looks cheap — low price, low P/E — but keeps falling because the business itself is getting worse. Cheap can always get cheaper; a low price alone is not a bargain.
Variable Cost — A cost that changes depending on how much you trade, like per-contract option fees or interest on a margin loan. The more active you are, the more these add up.
Vega — A measure of how much an option's price changes when expected volatility moves by one percentage point. If vega is 0.10, the option gains or loses about $10 per contract for each 1% change in implied volatility.
Velocity — How fast price is moving, not just which direction. High velocity moves can blow straight through stop levels, which is why fast markets demand smaller size.
Vertical Spread — An options trade using two options of the same type and expiration but different strike prices, like buying a $50 call and selling a $55 call. It costs less than a single option and caps both your risk and your reward.
VIX (Volatility Index) — A number that measures how much movement traders expect in the S&P 500 over the next 30 days. It often spikes when fear rises, which is why it is nicknamed the "fear gauge."
Volatility — How much and how fast a price swings around. A stock that moves 5% a day is far more volatile than one that moves 0.5% a day.
Volatility Crush (IV Crush) — A sharp drop in an option's price right after a big expected event, like an earnings report, because the uncertainty is gone. It can hurt option buyers even when the stock moves their way.
Volatility Smile — The curved pattern — shaped like a smile — that appears when you plot implied volatility across an option chain's strike prices. It shows that far out-of-the-money options carry extra implied volatility compared to at-the-money ones.
Volatility Targeting — A strategy approach where position size is adjusted based on how wild the market is: smaller size when volatility is high, larger when it is calm. The goal is keeping your dollar risk steadier instead of your share count.
Volume — How many shares or contracts changed hands during a period. A stock that trades 10 million shares a day has far more volume than one that trades 10 thousand.
Volume Profile — A chart tool that shows how much trading happened at each price level, not just over time. It highlights prices where buyers and sellers were most active.
VWAP (Volume-Weighted Average Price) — The average price of a stock for the day, weighted so trades with more volume count more. Big institutions compare their fills to VWAP, and many traders use it as a fair-price line on the chart.

W

Wall Street — A street in New York City where the financial industry grew up, now used as a nickname for the entire US financial system: the exchanges, big banks, and funds.
Warrant — A long-term certificate, usually issued by a company, giving the holder the right to buy its stock at a set price before a future date. It works much like a long-dated call option.
Wash Sale — A tax rule: if you sell a stock for a loss and buy a substantially identical one within 30 days before or after that sale (a 61-day window total), the loss is disallowed for taxes for now. This is educational only, not tax advice — talk to a tax professional.
Wash Trading — The illegal practice of buying and selling the same asset to yourself or a partner to fake trading activity. It creates the illusion of interest in a stock or coin — a classic pump-and-dump ingredient.
Watchlist — A personal list of stocks or contracts you are keeping an eye on but have not bought. Most traders track a small watchlist instead of the whole market.
Waterfall — A rapid series of drops where each fall triggers more selling, like price falling down steps. Waterfall declines often come from stop losses and margin calls firing one after another.
Weak Hands — Traders who bail out at the first sign of trouble, selling into small dips. Price often shakes out weak hands right before a move — strong hands are the ones with a plan they can actually hold.
Wedge — A chart pattern where price swings get narrower between two slanted lines, squeezing like a wedge. It often shows a move is running out of steam and may reverse or break out.
Weekly Options — Option contracts that expire in about a week, listed with expirations on multiple days each week for popular stocks and indexes. Their short life makes time decay very fast.
Weighting — How much influence each stock has inside an index or fund. In the S&P 500, bigger companies count more, so Apple moving 1% shifts the index far more than a small company moving 1%.
Whipsaw — When price suddenly reverses direction right after moving the other way, trapping traders who just entered. Choppy markets whipsaw traders with repeated small losses.
Wick — The thin line sticking out of the top or bottom of a candlestick, showing how far price traveled beyond the candle's body. A long lower wick means buyers pushed price back up; a long upper wick means sellers pushed it back down.
Wide Market — A market with a big gap between the bid and ask prices, usually in thin, unpopular stocks or options. Trading wide markets is expensive — you lose a chunk to the spread the moment you enter.
Window Dressing — When fund managers buy winning stocks and dump losers right before reporting their holdings, so the portfolio looks smarter than it was. It is cosmetic, and it happens near the end of each quarter.
Winner's Curse — The tendency for the person who wins an auction — or chases a hot stock everyone wants — to have overpaid. Winning the bidding war often means you paid more than the thing was worth.
Working Order — An order you have placed that has not filled yet and is still active, like a limit order waiting for its price. It stays working until it fills, you cancel it, or it expires.
Writer (Option Writer) — The person who sells an option contract and collects the premium. The writer takes on the obligation: a call writer may have to sell shares at the strike price.

Y

Year-over-Year (YoY) — Comparing a number to the same period one year earlier, like this quarter's sales versus the same quarter last year. It removes seasonal effects and shows true growth.
Year-to-Date (YTD) — A measurement from January 1 to today. If a stock is "up 12% YTD," it has gained 12% since the start of the year.

Yield — The income an investment pays you, shown as a percentage of its price. A stock priced at $100 that pays $3 a year in dividends has a dividend yield of 3%.
Yield Curve — A line showing interest rates for bonds of different lengths, from months to 30 years. Normally longer bonds pay more; when short-term rates rise above long-term ones, economists watch closely because it has often preceded recessions.
Yield Spread — The difference in yield between two bonds — for example, a risky corporate bond versus a safe Treasury. A widening spread means investors are demanding more pay for risk, which can be an early stress warning.
Yield to Maturity (YTM) — The total yearly return you would earn if you bought a bond at today's price and held it until it matures, collecting every payment. It lets you compare bonds with different prices and coupons fairly.

Z

Zero DTE (0DTE) — Options that expire today, on the same day you trade them ("DTE" means days to expiration). They can move from cheap to worthless in minutes, so they are extremely risky and decay incredibly fast.
Zero-Coupon Bond — A bond that pays no regular interest; instead you buy it at a discount and receive the full face value at maturity. The gap between your price and the face value is your return.
Zero-Sum Market — A market where one trader's gain is exactly another trader's loss, like futures and options. For every winner there is a loser on the other side of the trade, before fees.
Zone — A price area — rather than one exact line — where buying (demand zone) or selling (supply zone) is expected to show up. Traders draw zones because real buying and selling happens across ranges, not at single pennies.