Pull up any stock’s options page, and the screen fills with numbers. Dozens of rows, over 10 columns, and values that look nothing like the stock’s price. This table is the options chain, and every contract available on that stock lives somewhere inside it.
The chain looks intimidating because it provides a ton of information at once. Each column answers a question, like what buyers are offering right now or how many contracts changed hands today.
Let’s break down the options chain column by column. Once you learn which question each column answers, the screen turns from a jumble into a menu.
Learn more: What are options, and how do they work?
What is an options chain?
An options chain is a grid view of every contract you can trade on an underlying asset, whether that asset is a stock, an exchange-traded fund (ETF), or something else.
Every option is either a call, which gives the contract’s buyer the right to buy the underlying asset at a set price, or a put, which gives the buyer the right to sell the underlying asset. In exchange, the buyer pays an up-front fee, or premium, for each contract.
Each row on the chain represents a single strike price, with call and put details listed side by side. Let’s zoom in on each part of the chain to see what it’s telling you.
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The information above the chain
Before the table begins, the top of the screen anchors everything below it. You’ll typically find the ticker symbol, the company’s name, and the stock’s current price with its change for the day. The Nvidia (NVDA) options chain, for example, opens with the stock trading at $212.26, up $0.20 on the day.
Every contract keys off that current stock price, so check it before reading anything else. However, keep in mind that layouts and labels vary from broker to broker, which is why your platform may not offer an exact match to this view.
How the chain is organized
Three choices structure the whole table, and each one narrows down exactly which contract you’re looking at.
Expiration dates
A row or list of expiration dates typically sits right below the stock ticker and price, each representing a deadline when its contracts cease to exist. Each date opens a different set of contracts. Nvidia’s 15-day and 29-day contracts, for example, are separate products.
The dates follow set cycles. Monthly contracts typically expire on the third Friday of the month. Exchanges can also list weekly expirations, up to five at once, which is why Nvidia’s chain shows three closely spaced dates, 15, 22, and 29 days out.
Calls and puts
The next section, typically located at the center of the chain, divides the available contracts for each date into calls and puts:
Call: A call gives its buyer the right to buy shares of the stock at a set price for a limited time.
Put: A put gives its buyer the right to sell shares of the stock at a set price for a limited time.
On AlphaSpace by Yahoo Finance, calls are on the left side of the chain, and puts are on the right, which is the same layout Schwab and Fidelity use. Robinhood’s standard layout takes a different route with a focused view that displays one contract type at a time.
Whatever the layout, confirm which side you’re reading before anything else. Mixing up calls and puts flips the meaning of every number that follows.
Strike prices
The prices both halves share are strike prices. On side-by-side layouts, they run down the middle of the table. The strike is the price at which the contract’s buyer can buy the stock through a call or sell it through a put.
Each row uses a different strike, listed in set increments that vary by stock. Nvidia’s chain lists its strikes in tight $2.50 steps even above the $200 mark — tighter than the spacing most stocks typically get at that price.
You’ll find the stock’s current price sitting in an empty row between the strikes above it and the strikes below it. This row separates contracts that are in the money or out of the money. For example, with Nvidia stock trading at $212.26:
In the money: A call with a strike below the stock’s price, or a put with a strike above it. On Nvidia’s chain, that’s the $210, $207.50, and $205 calls, and the $215 and $217.50 puts.
Out of the money: A call with a strike above the stock’s price, or a put with a strike below it. That’s the $212.50, $215, and $217.50 calls, and the $210, $207.50, and $205 puts.
Some platforms visually mark the boundary. On Schwab’s thinkorswim trading platform, in-the-money contracts sit in a highlighted area on each side of the chain.
How to read one row of the chain
Each row covers information that can inform your trade. Look at the $212.50 strike on Nvidia’s chain, and you’ll notice that several numbers are attached to it. These numbers cover everything from what buyers are offering right now to how much the market expects the stock to move before expiration.
Read more: What is options trading?
Bid and ask
Two live quotes accompany every contract, showing what buyers offer and sellers request right now:
Bid: The highest premium buyers in the market are currently offering for the contract. On the $212.50 call, that’s $9.40.
Ask: The lowest premium sellers are currently requesting for the contract. On the $212.50 call, that’s $9.55.
Traders name the gap between those two prices the spread, $0.15 on that call. Buy at the ask and sell at the bid with nothing moving in between, and the spread comes out of your pocket.
A wide spread generally signals a contract that trades less actively. On a contract far from the stock’s price or close to expiring, that gap can widen enough to show a near-zero bid against a small ask.
Every price on the chain is quoted per share, not per contract, and a standard equity options contract represents 100 shares. Multiply any quoted premium by 100 to find what a contract actually costs, and add or subtract that premium from the strike to see where a purchased option breaks even at expiration.
Here’s an example using Nvidia’s $212.50 strike:
That $222.05 call breakeven is about 4.6% above Nvidia’s current price. The put’s $203.25 breakeven is about 4.2% below it.
Keep in mind that corporate actions like mergers and stock splits can sometimes create adjusted contracts that represent something other than 100 shares. Fidelity’s Active Trader platform, for example, flags these with an “Adj” label next to the strike. Worth checking if a premium looks unusually cheap or expensive.
Learn more: How to trade options in 7 steps
Last and mark
One or two more numbers often sit next to those live quotes, one pulled from history and one calculated by your broker:
Last price: The price of the contract’s most recent trade, which, on a slower contract, could be hours or days old.
Mark: A reference value your broker calculates, typically the midpoint between the bid and ask.
Nvidia’s $212.50 put last traded at $9.30, but its current ask is $9.25. Because puts generally lose value when the underlying stock rises, the lower quote suggests Nvidia’s stock price moved higher after the last trade. Other factors can also affect the option’s price.
A market order generally fills at or near the current bid or ask price, but the last traded price isn’t necessarily the price a market order will get.
For that same put, with a $9.15 bid and a $9.25 ask, the midpoint works out to $9.20. The mark may sit below the ask, but an order placed there may not fill as quickly or at all, since the midpoint isn’t necessarily a price anyone is willing to trade at. That’s why you should treat the mark as a reference point, not a fulfillment promise.
Net change and percent change
Net change and percent change are two separate columns you may find on some platforms that measure a contract’s move against the previous day’s closing price.
Net change: The dollar amount a contract has moved from the prior close to the current mark. Nvidia’s $212.50 call is up $2.35 on the day, while the put at the same strike is down $2.40.
Percent change: That same move expressed as a percentage. The call’s $2.35 gain works out to 32.96%, and the put’s $2.40 loss comes to 20.69%.
Those percentages look extreme next to Nvidia stock’s minuscule 0.09% move. An option’s price depends on more than the stock’s daily change, including shifts in expected volatility, time remaining, and the current quotes. Since this strike price is quite close to the stock’s current price, even small changes can meaningfully change the chance that the option finishes in the money, causing the contract’s price to move much more sharply than the stock itself.
Volume and open interest (OI)
These two columns are easy to mix up, even though they measure completely different things:
Volume: The number of contracts traded during the current session, resetting to zero each morning.
Open interest (OI): The number of outstanding contracts after the previous session’s trades have been processed.
The two also update on different schedules. Volume ticks up during the day, while open interest waits for the options market’s clearinghouse to pair up opening and closing trades after the close, so the number on screen reflects the prior session’s count.
Every outstanding contract has both a buyer and a seller, but open interest counts the contract once rather than counting each side separately. On its own, that count doesn’t say whether traders expect the stock to rise or fall.
A trade doesn’t even guarantee the count changes: When one trader opens a new position, and someone else closes an old one, open interest stays flat. A big number doesn’t promise an easy sale of your contract, either.
Implied volatility (IV)
Implied volatility (IV) measures how much the options market expects the stock’s price to fluctuate in either direction before the contract expires. Many traders favor it over historical volatility measured from past prices, since it’s calculated from current option prices and reflects the market’s expectations for the future.
That percentage is quoted as an annualized figure, even when the contract expires in only a few weeks. That does not mean the stock is expected to move by the full percentage before expiration. Annualizing the number instead puts contracts with different expiration dates on the same scale, making their implied volatility easier to compare.
What implied volatility won’t tell you is which way the stock is headed. It prices the size of the move, not the direction, so a high reading fits a stock that could just as easily jump or crash. The number can also shift from one expiration to the next, since Nvidia’s 15-day and 29-day contracts don’t have to price the same expected move, even on the same stock.
Keep in mind that higher implied volatility generally means higher option premiums, all else equal, because a wider range of possible stock prices increases the potential value of both calls and puts.
The Greeks and other estimate columns
Most platforms let you add extra columns. Depending on your platform, you may find:
Delta, gamma, theta, vega, and rho: Known together as the Greeks, these estimate how a contract’s price responds to forces like the stock’s price moving, time passing, and shifts in implied volatility.
Breakeven: The price the stock needs to reach at expiration for a purchased option to cover its premium, found by adding the premium to the strike for a call or subtracting it for a put.
Probability metrics: Figures that some brokers use to estimate the odds a contract finishes in the money.
Theoretical value: An estimate of what a contract should be worth right now, calculated by an options-pricing model rather than quoted by a live trader. It’s useful for spotting a quote that looks cheap or expensive, though the estimate is still just a model’s output.
7 ways beginners misread an options chain
The chain doesn’t tell you what to think. It reports numbers. However, those numbers can easily be misread. These seven slips cause the most confusion:
Reading the wrong side: Calls and puts sit right next to each other, but their numbers describe different contracts. Glance at the wrong column, and a contract that looks cheap or expensive is neither, since you’re reading a completely different contract.
Sitting on the wrong date: Only one expiration’s contracts show at a time, and expanding the wrong row swaps in a completely different set of prices. A quote that looks unusually cheap or expensive often just belongs to the wrong date.
Treating the last price as current: The last price only updates when a trade happens, or on a slower contract, which could be hours old.
Reading open interest as a forecast: A high open interest count feels like a signal, but it only shows how many contracts remain open. That number alone can’t tell you why traders entered those positions or which way they expect the stock to move.
Forgetting the multiplier: Every quote on the chain is a per-share price, not the cost of the contract. A $9.55 ask on an Nvidia call actually costs $955, since one contract covers 100 shares.
Treating implied volatility as a prediction: Implied volatility prices how big a move might be, not which direction it goes. A call and a put on the same stock often carry similar readings, since a bigger expected swing helps both sides at once.
Expecting the mark to fill: An order priced right at the mark looks reasonable on paper, but nobody on the other side has actually agreed to that number. It can sit unfilled for as long as neither side moves toward it.
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How to read an options chain FAQs
Why does one option show several different prices?
Each price answers a different question. The bid shows what buyers currently offer, and the ask shows what sellers currently request. The last price records the most recent trade, which may be old news. The mark is a value your broker calculates as a reference point, typically midway between the bid and ask. None of them locks in what a new order would actually get.
Does high call volume mean traders expect the stock to rise?
Not by itself. Every contract traded pairs a buyer with a seller, so the same trade sits on both sides of the ledger. Some of that volume also comes from traders closing positions they already hold rather than opening new ones. The count measures activity, and it doesn’t take sides.
What does it mean when an option’s bid shows zero?
No buyer is posting an offer at that moment. It’s most common on contracts far from the stock’s price or nearly out of time. In those cases, the market can show a zero bid against a small ask. For anyone holding that contract, a zero bid means there is no standing offer to sell into.
Do I need the Greeks to read an options chain?
No. The Greeks are optional columns that estimate how a contract’s price responds to changes, like a move in the stock or a day passing. They add context for pricing, but the core of the chain reads fine without them: the strike, the expiration, the quotes, and the activity counts.
Editorial disclaimer: Information on this page is for educational purposes and not investment advice or a recommendation to buy any specific asset or adopt any particular investment strategy or platform. Independently research products and strategies before making any investment decision.
