BSE Sensex 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 BSE Sensex lot size last changed from 10 to 20, for contracts listed from 20 Nov 2024 (BSE, under SEBI's circular of 1 Oct 2024).

Next BSE Sensex expiries

About BSE Sensex

BSE's flagship 30-stock benchmark index, the exchange's answer to NIFTY 50, and India's oldest stock market index, tracking large, established companies across sectors.

• With only 30 constituents against NIFTY's 50, Sensex is a narrower large-cap basket. In practice its moves track NIFTY closely most sessions, since the two indices share many of the same heavyweight names, though the smaller constituent count means any single name's move carries more relative weight here than in NIFTY.
• Options liquidity on Sensex has historically run well behind NIFTY's, concentrated more heavily in the weekly, near-the-money strikes around expiry, which matters for anyone used to NIFTY's depth further out on the chain.

Questions

What is the BSE Sensex lot size?

One BSE Sensex options or futures lot is 20 units, as of 24 Oct 2026.

When does BSE Sensex expire?

BSE Sensex weekly options expire every Thursday, and the monthly contract 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 Sensex lot size last change?

The BSE Sensex lot size last changed from 10 to 20, for contracts listed from 20 Nov 2024 (BSE, under SEBI's circular of 1 Oct 2024).

What is the BSE Sensex freeze quantity?

1,000 units (50 lots). The exchange rejects a single order larger than this, so a bigger position is placed as several orders.

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