BANKNIFTY · SESSION …SOURCE: NSE F&O BHAVCOPY · END OF DAY · ₹ CRORE
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Bank Nifty GEX in one paragraph
Bank Nifty GEX is the net gamma exposure of BANKNIFTY options. The mechanics are identical to NIFTY: open interest times gamma times lot size times spot squared, summed across strikes. What differs is the index, which is concentrated in a small number of bank stocks and moves faster for the same news.
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Why BANKNIFTY needs its own reading
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Concentration: A handful of large lenders drive most of the index, so single-stock news moves it quickly.
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Higher implied volatility: Gamma is larger near the money and falls faster away from it, so the profile is sharper.
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Different expiry cycle: The listed expiries and their liquidity differ from NIFTY. Check the current NSE contract schedule rather than assuming the weekly pattern you remember.
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Event sensitivity: Policy announcements and results seasons shift volatility, and with it every gamma figure.
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How to read it
Read the sign first, then the distance from the gamma flip, then where gamma concentrates. A large positive GEX with spot near a heavy call strike describes a pinning setup. Negative GEX with spot below the flip describes an environment where hedging flow adds to moves.
Compare today's value with the same index's own recent range. A GEX figure is only meaningful relative to that index's usual levels, and BANKNIFTY and NIFTY values are not comparable with each other.
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Limits
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Same dealer-sign assumption as NIFTY, since exchange data does not reveal who holds each side.
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Narrow liquidity at far strikes can distort the profile.
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Stock-specific events can move the index regardless of option positioning.
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Frequently asked questions
What is Bank Nifty GEX?
It is the net gamma exposure of BANKNIFTY options, in rupees per 1% move of the index.
Can I compare BANKNIFTY GEX with NIFTY GEX?
Not directly. The indices differ in level, volatility and liquidity, so compare each against its own history.
Does Arkenwell show BANKNIFTY GEX?
Yes. Select BANKNIFTY in the Dealer Positioning workspace to see its GEX profile and gamma flip.
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