BANK NIFTY lot size and expiry day

Lot size, expiry and freeze quantity are read from the exchange's contract list, refreshed every six hours; last read 24 Oct 2026. The strike step is DeltaK's own engine configuration.

The BANK NIFTY lot size last changed from 35 to 30, for contracts expiring from 27 Jan 2026 (NSE circular NSE/FAOP/70616 of 3 Oct 2025).

Next BANK NIFTY expiries

About BANK NIFTY

NSE's benchmark for the Indian banking sector: the most liquid private and public sector banks by free-float market cap. Historically the more volatile of NSE's two most-traded index contracts, given how concentrated bank earnings and rate-policy sensitivity are inside a single sector bet.

• Concentration cuts both ways here: a handful of large private banks carry outsized weight, so a single stock's results day or a surprise RBI rate move can shift the whole index far harder than the same news would move NIFTY's broader 50-stock spread.
• That higher realized volatility is why BANKNIFTY premium tends to run richer at the same relative distance from spot than NIFTY's. That suits strategies built around selling premium (short strangles, iron condors) when a range holds, and punishes them correspondingly when it doesn't.
• Wall migration tends to be sharper and faster here than on NIFTY. Aegis and Zenith can shift a full strike or two in a single volatile session around a policy event, which is exactly the kind of regime DeltaK's Protocol Delta (Volatility Trap) is built to recognize and stand aside from rather than force a read.

Questions

What is the BANK NIFTY lot size?

One BANK NIFTY options or futures lot is 30 units, as of 24 Oct 2026.

When does BANK NIFTY expire?

BANK NIFTY has no weekly options listed: its contracts expire monthly, on the last Tuesday of the month. The next expiry is 27 Oct 2026. When the exchange is shut on the usual day, that expiry moves to the trading day before it.

When did the BANK NIFTY lot size last change?

The BANK NIFTY lot size last changed from 35 to 30, for contracts expiring from 27 Jan 2026 (NSE circular NSE/FAOP/70616 of 3 Oct 2025).

What is the BANK NIFTY freeze quantity?

1,440 units (48 lots). The exchange rejects a single order larger than this, so a bigger position is placed as several orders.

Other Indian F&O indices