The BANK NIFTY option chain is the full table of call and put contracts listed on NSE for a given expiry, one row per strike. For each strike it shows the last traded price, implied volatility and open interest, with calls on one side and puts on the other and the at-the-money strike marked in the middle. Strikes below spot are in-the-money for calls; strikes above spot are in-the-money for puts.
BANK NIFTY tracks the most heavily traded banking stocks and moves faster than the broad market, so its option data swings harder through the session. The chain is the raw source that every other page here is derived from: the BANK NIFTY PCR is computed from its OI totals, the max pain strike from its OI payout curve, and the IV smile from its per-strike implied volatilities. Use the links above to jump between those views on the same underlying.