Glossary
What is Option Chain? Meaning, Example & Why It Matters
A table showing all available call and put options for an underlying, with prices, volume and open interest by strike.
An option chain is a structured list of every option contract available for a particular underlying and expiry. It usually shows calls on one side and puts on the other, with strike prices running down the middle. For each strike, you can see the last traded price, bid and ask, volume, open interest and sometimes implied volatility and Greeks.
Why Option Chain matters to you
Traders use the option chain to compare strikes quickly and spot where activity is concentrated. Open interest shows how many contracts are outstanding, and volume shows how actively a strike is trading today. Liquid strikes tend to have tighter bid-ask spreads, which lowers the hidden cost of entering and exiting.
It is tempting to read option chain data as a prediction of where the market will go, for example by looking at strikes with the highest open interest. These interpretations are popular but not reliable on their own. Open interest reflects both buyers and sellers, and positions can change quickly.
Practical tip: use the option chain mainly to check liquidity, spreads and premiums before placing a trade. Make sure you are looking at the correct expiry, as the chain for different expiries can look very similar at first glance.
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Related terms
- GlossaryOptions
A contract giving the buyer the right, but not the obligation, to buy or sell an asset at a set price before expiry.
- GlossaryStrike Price
The fixed price at which an option holder can buy (call) or sell (put) the underlying asset.
- GlossaryOption Premium
The price an option buyer pays to the seller for the rights the option contract provides.
- GlossaryExpiry
The date on which a futures or options contract ends and is settled according to exchange rules.
Frequently asked questions
Where can I find the option chain?
Exchange websites like NSE publish option chains, and most broker platforms show them within their trading apps.
What is open interest?
Open interest is the total number of outstanding contracts at a strike that have not been closed or settled.
Does high open interest mean the price will stop there?
Not necessarily. Some traders read it that way, but it is not a reliable forecast on its own.