BSE Bankex 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 25 Oct 2026. The strike step is DeltaK's own engine configuration.

The BSE Bankex lot size last changed from 15 to 30, for contracts listed from 20 Nov 2024 (BSE, under SEBI's circular of 1 Oct 2024).

Next BSE Bankex expiries

About BSE Bankex

BSE's banking-sector index, the exchange's counterpart to Bank Nifty: a narrower, bank-focused alternative to the broad Sensex.

• Shares the same sector-concentration character as BANKNIFTY, with a handful of large banks carrying outsized weight, so the same earnings-day and rate-policy sensitivity that makes BANKNIFTY the more volatile of NSE's two flagships applies here on the BSE side too.
• As the less-traded of BSE's two index contracts, Bankex liquidity sits behind both Sensex and NIFTY/BANKNIFTY, so confirm actual depth on the live chain rather than assuming NSE-level liquidity carries over.

Questions

What is the BSE Bankex lot size?

One BSE Bankex options or futures lot is 30 units, as of 25 Oct 2026.

When does BSE Bankex expire?

BSE Bankex has no weekly options listed: its contracts expire monthly, on the last Thursday of the month. The next expiry is 29 Oct 2026. When the exchange is shut on the usual day, that expiry moves to the trading day before it.

When did the BSE Bankex lot size last change?

The BSE Bankex lot size last changed from 15 to 30, for contracts listed from 20 Nov 2024 (BSE, under SEBI's circular of 1 Oct 2024).

What is the BSE Bankex freeze quantity?

900 units (30 lots). The exchange rejects a single order larger than this, so a bigger position is placed as several orders.

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