How to read an option chain: a beginner's guide

What is an option chain?

An option chain (or option matrix) is simply a list of every option contract available for a particular stock or index, laid out as a table. It is the menu of choices: every strike price, for both calls and puts, with live data for each. Most platforms put calls on the left, puts on the right, and the strike prices running down the centre column shared by both. Once you know that layout, the rest is just reading columns.

The strike price column

Running down the middle are the strike prices — the fixed prices at which each option can be exercised. They are listed in steps (for example, every 50 or 100 points on an index). The strike closest to the current price of the underlying is the at-the-money strike, and it's the natural reference point: strikes above and below it are where calls and puts move between in-the-money and out-of-the-money.

LTP, volume and open interest

A few columns do most of the work:

• LTP (last traded price): the premium the option last changed hands at — effectively its current price.
• Volume: how many contracts traded during the session — a measure of activity today.
• Open interest (OI): the total number of outstanding contracts not yet closed — a measure of how much positioning sits at that strike. Rising OI means new positions are building. It is widely watched, though it describes positioning, not a prediction.

Together these tell you how liquid and active a given strike is. Thinly traded strikes can be harder to enter and exit at a fair price.

Implied volatility (IV)

Most chains also show implied volatility for each strike — the market's expectation of how much the underlying might move, expressed as a percentage. Higher IV means options are relatively more expensive, because a bigger expected move makes the option more valuable; lower IV means cheaper options. IV is one reason two options at the same distance from price can carry very different premiums. (For how an option's value erodes over time regardless of IV, see what is theta.)

ITM, ATM and OTM at a glance

The chain is usually shaded to show moneyness. For calls, strikes below the current price are in-the-money and strikes above are out-of-the-money; for puts it's reversed, so the two sides mirror each other around the at-the-money strike. Scanning that shading is the quickest way to orient yourself — it instantly shows where price sits relative to every strike.

An option chain isn't a crystal ball — it's a menu. Knowing the columns turns a wall of numbers into a simple, readable table.

A word of caution

An option chain is a data display, not a signal. It shows what is available and how it is priced and positioned — it does not tell you what will happen, and no single column predicts direction. Reading it well means understanding the contracts, not hunting for a magic number. Whatever the chain shows, options carry a high risk of loss, and most option buyers lose money.