NSE lowers Nifty Derivatives Lot Size to 65, rewind contract sizes for other important indices of December 30

The National Stock Exchange (NSE) has announced that the party size for Nifty 50 Futures and Options contracts will be reduced from 75 to 65 from December 30, 2025 (EOD).

This revision is part of a broader update of the market parties for various important index derivatives, according to the Sebi guidelines for periodic assessment. The changes are specifically applicable to quarterly and half-yearly contracts that end after December 30, while weekly and monthly contracts will continue with the existing party sizes until that date.

The revised market parties influence four major indices. Together with the Nifty 50’s party size that drops to 65, the Bank will move Nifty contract size from 35 to 30, Nifty Financial Services will change from 65 to 60, and Nifty Midcap Select will reduce from 140 to 120.

The party size for Nifty next 50 remains unchanged at 25.

NSE explained that the overhaul is based on the average final price of the underlying indices in September 2025, which is used to determine contract values ​​and to keep them in a balanced reach.

The updated Lotgrottes are only applied to contracts with expiry dates after December 30, 2025. All contracts that end before this closure, including weekly and monthly expiry date, continue to use the current party sizes. 2026.

What does it mean for traders and investors?

The change of lotteries means that traders and investors must adjust the number of units they buy or sell in one futures or options. Previously, a single useful Futures contract, for example, represented 75 units of the index, but from December 30, 2025 it will only represent 65 units.

This influences how much capital is needed to take one party position, because the total contract value changes on the basis of both the party size and the index price.

For traders, in particular those in large quantities or with the help of hedge strategies, this overhauling position sizes and adjusting margin requirements may require. Because the party size is linked to margin and exposure, a smaller party size can lower the notional value per contract, which can influence how they plan their transactions.

For retail investors, the reduced party size can make it a little more accessible to participate in some index contracts, because the capital needed to trade one lot could reduce if the index price remains stable.

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