Why are F&O contracts not displayed for a particular stock?

The Futures and Options (F&O) contracts are available only for a subset of the listed securities (WEB) on the exchange along with a few indices, namely Nifty, Bank Nifty, Nifty Midcap select, FinNifty, Bankex and Sensex.

If the F&O contract is not displayed even after spelling the instrument's name correctly, then the stock may not be tradable in the F&O segment. SEBI sets specific criteria(WEB) for instruments to be included in the F&O segment.