Essential Options Trading Terms Every Beginner Should Know

Options trading has a language of its own. Before you can confidently read an options chain, evaluate a strategy, or place a trade, you need to understand the core vocabulary. This guide covers the essential terms every beginner needs, organized by category and explained in plain language with examples.

The core contract terms

Option: a contract giving the buyer the right, but not the obligation, to buy or sell 100 shares of a stock at a fixed price before or on a specific date.

Call option: gives the buyer the right to buy 100 shares at the strike price. You buy calls when you expect the stock to rise.

Put option: gives the buyer the right to sell 100 shares at the strike price. You buy puts when you expect the stock to fall.

Strike price: the fixed price at which the option can be exercised. For a call, the price you can buy at. For a put, the price you can sell at.

Expiration date: the last day the option contract is valid. After this date, it either gets exercised (if it has value) or expires worthless.

Premium: the price of the options contract. Quoted per share, so multiply by 100 for the total cost. A premium of $2.50 means $250 per contract.

Underlying: the stock or ETF that the option is based on. If you trade an AAPL option, AAPL is the underlying.

Moneyness terms

In the money (ITM): the option has intrinsic value right now. A call is ITM when the stock is above the strike. A put is ITM when the stock is below the strike.

At the money (ATM): the strike price is equal to or very close to the current stock price.

Out of the money (OTM): the option has no intrinsic value. A call is OTM when the stock is below the strike. A put is OTM when the stock is above the strike.

Intrinsic value: the real, immediate value of an option if exercised now. Only ITM options have intrinsic value.

Extrinsic value: the portion of premium above intrinsic value, made up of time value and volatility premium. Also called time value.

Volatility terms

Implied volatility (IV): the market's expectation of how much a stock will move, derived from option prices. High IV means expensive options. Low IV means cheap options.

IV rank: where current IV sits relative to its range over the past year, from 0 to 100. Above 50 means options are relatively expensive (favor selling). Below 30 means relatively cheap (favor buying).

IV crush: the sharp drop in implied volatility after a major event like earnings, which causes option prices to fall rapidly.

Historical volatility (HV): how much the stock has actually moved in the past, as opposed to what the market expects going forward.

The Greeks

Delta: how much an option's price changes per $1 move in the stock. Also approximates the probability of expiring in the money.

Theta: the daily dollar decay of an option's value from time passing. Works against buyers, in favor of sellers.

Vega: how much an option's price changes per 1% change in implied volatility.

Gamma: how fast delta changes as the stock moves. Highest for at-the-money options near expiration.

Rho: how much an option's price changes per 1% change in interest rates. The least significant Greek for most short-term traders.

Trading and mechanics terms

Bid: the highest price a buyer will pay for an option. You receive approximately this when selling.

Ask: the lowest price a seller will accept. You pay approximately this when buying.

Bid-ask spread: the difference between the bid and ask. A cost of trading. Tighter is better.

Open interest: the total number of outstanding contracts at a strike. Higher open interest means better liquidity.

Volume: the number of contracts traded today. Resets daily.

Liquidity: how easily an option can be bought or sold without moving the price. High liquidity means tight spreads and easy fills.

Assignment: when a short option holder is required to fulfill the contract, buying or selling shares at the strike.

Exercise: when a long option holder invokes their right to buy or sell shares at the strike.

DTE: days to expiration. A common shorthand, as in a 45 DTE iron condor.

Strategy and position terms

Long: a position where you bought the option (you own it). Long call, long put.

Short: a position where you sold the option (you have the obligation). Short call, short put.

Covered: a short option backed by the underlying stock or cash. A covered call is backed by shares you own.

Naked: a short option with no backing, carrying larger risk.

Spread: a position combining two or more options, such as buying one and selling another.

Credit spread: a spread where you collect net premium upfront.

Debit spread: a spread where you pay net premium upfront.

Defined risk: a position where the maximum loss is known and capped before entering.

Undefined risk: a position where the maximum loss is not capped and can be large.

Event and timing terms

Earnings: a company's quarterly financial report, a major driver of options volatility.

OPEX: options expiration, specifically the monthly expiration on the third Friday of each month.

0DTE: zero days to expiration, options expiring the same day they are traded.

Implied move: the market-expected magnitude of a stock's move around an event, derived from option prices.

Pin risk: uncertainty when a stock closes very near a strike at expiration, making assignment unpredictable.

Related terms: Call option, put option, strike price, premium, implied volatility, delta, theta

Try it on Stryke: Put these terms into practice by exploring live options data in the Options Screener.