How to use the options chain with greeks: calls and puts by strike
- Search for a stock symbol, or keep the default, AAPL.
- Pick an expiration from the list, which shows each date and the days remaining.
- Find the at the money row, highlighted at the strike closest to the current stock price.
- Read bid, ask, last, volume, open interest, IV and Greeks for the call on the left and the put on the right.
- Click a strike to open a long call at that strike in the options profit calculator.
How to read an options chain
An options chain is a table of every option listed for one underlying and one expiration. Each row is a strike price. The call with that strike sits on the left and the put with the same strike on the right, so you can compare both sides of a strike at a glance. The row closest to the current stock price is highlighted as at the money, and cells for options that are in the money are shaded.
Prices are quoted per share, so multiply by 100 for the cost of one standard contract. The columns, repeated for calls and puts, are:
- Bid: the highest price a buyer is currently offering. Selling at market typically fills near the bid.
- Ask: the lowest price a seller is currently offering. Buying at market typically fills near the ask.
- Last: the price of the most recent trade, which can be stale for options that trade rarely.
- Vol: volume, the number of contracts traded so far today.
- OI: open interest, the number of contracts still outstanding, updated once a day.
- IV: implied volatility, the annualized volatility implied by the option's price, shown as a percentage.
- Delta, gamma, theta and vega: how the price responds to a $1 stock move, how fast delta changes, how much value one day removes, and how the price responds to a 1 point change in IV.
Moneyness: in, at and out of the money
A call is in the money when its strike is below the stock price, and a put is in the money when its strike is above it. At the money options have strikes at or near the stock price, and out of the money options have no intrinsic value. In this chain, call cells are shaded for strikes below the current price and put cells for strikes above it.
Moneyness drives the rest of the row. In the money options cost more because they carry intrinsic value, and their deltas sit further from zero. Out of the money options are cheaper, consist entirely of time value and have smaller deltas. At the money options carry the most time value and usually have the highest gamma and the largest daily theta.
Bid, ask, volume and open interest
The difference between the bid and the ask is the bid ask spread, and it is a real cost of trading. A buyer who pays the ask and later sells at the bid gives up the full spread. The midpoint between bid and ask is a common reference price, and limit orders let you choose your price instead of accepting the ask or the bid. Wide spreads, low volume and low open interest are signs of an illiquid option.
Volume and open interest measure activity in different ways. Volume counts contracts traded today and resets every session. Open interest counts contracts still open and changes only when positions are opened or closed, so rising open interest means more positions are being opened than closed.
Implied volatility and Greeks in an option chain
Each option's implied volatility is solved from its market price, so IV varies by strike and expiration. The pattern of IV across strikes is called the volatility skew or smile, and for stocks and stock indexes, out of the money puts often carry higher IV than out of the money calls.
An option chain with Greeks shows what each contract does as the market moves. Delta is the quickest way to scan a chain: it shows directional exposure and roughly where an option sits between far out of the money (near 0) and deep in the money (near 1 for calls, negative 1 for puts). Theta shows the daily cost of holding the option and vega its exposure to IV changes. IV and Greeks in the chain come from the market data provider's model, so they can differ slightly from the American models in this site's calculators.
Expirations, delayed data and opening a contract
Listed options expire on set dates. Standard monthly options expire on the third Friday of the month, and many actively traded stocks and ETFs also list weekly expirations. The expiration menu lists every future date with the days remaining. Shorter expirations lose time value faster and react more sharply to stock moves, while longer ones carry more time value and more vega.
This options chain is delayed, and outside market hours it shows the previous session's close, so bid and ask can differ from the real time quotes at your broker. Confirm prices before you trade. To analyze a contract, click its strike: the chain opens a long call at that strike in the options profit calculator, prefilled with its ask price and implied volatility, where you can see the payoff chart, profit and loss table, Greeks and probability of profit.
Frequently asked questions
How do you read an options chain?
You read an options chain row by row: each row is a strike price, with the call for that strike on the left and the put on the right. For each option, check the bid and ask for price, volume and open interest for liquidity, and IV and delta for how expensive and how directional it is. Prices are per share, so multiply by 100 for one contract.
What is the difference between volume and open interest?
Volume is the number of contracts traded today, while open interest is the number of contracts still open. Volume resets every session, and open interest is updated once a day after the close. Higher volume and open interest tend to go with tighter bid ask spreads.
Is this options chain real time?
No, this options chain is delayed, and outside market hours it shows the previous session's close. Bid, ask, last and the stock price can differ from real time quotes, especially in fast markets. Confirm prices with your broker before placing an order.
Why do options at the same expiration have different implied volatilities?
Options at the same expiration have different implied volatilities because the market prices the risk at each strike differently. Out of the money puts often carry higher IV because they protect against sharp declines, which creates the volatility skew. Supply and demand at each strike also moves its IV.
What does in the money mean on an options chain?
In the money means the option has intrinsic value: a call whose strike is below the stock price, or a put whose strike is above it. This chain shades those cells. In the money options cost more and have larger deltas, and at expiration, options in the money by $0.01 or more are generally exercised automatically.
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Educational tool, not financial advice. Calculations are theoretical and depend on your inputs; real fills, fees, early assignment and dividends can change results. Options involve risk and are not suitable for every investor.