With effect from 28th October 2025, the lot sizes of index derivative contracts are being revised. This revision is based on the average closing price of the underlying indices for September 2025, ensuring that the contract value remains within SEBI’s prescribed range.
The current lot sizes will continue for all weekly and monthly contracts until 30 December 2025. From 30 December 2025 (EOD), the revised lot sizes will also apply to all quarterly and half-yearly contracts.
Here’s an overview of the changes in lot sizes:
Dates when the new lot sizes will come into effect:
Keep in mind
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From 30 December 2025 (EOD), the lot-size revision will apply to NIFTY and BANK NIFTY quarterly and half-yearly contracts.
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If you hold open positions in these contracts that don’t align with the new lot size, you won’t be able to square them off after the revision and will need to hold them until expiry.
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To avoid this, square off or adjust your position size before the revision date.
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Dates may change if a trading holiday is declared.
For more details, refer to the official NSE circular:
FAOP70616 – NSE Circular on Index Derivative Lot Size Revision
Please keep these changes in mind while carrying out your derivative trades.