NSE Revises Lot Sizes for Index Derivatives from December 2025; Nifty Lot Size to Reduce to 65

The National Stock Exchange (NSE) has announced changes to the market lot sizes for several major index derivatives, scheduled to take effect after the expiry of contracts in December 2025. These changes are expected to come into force from the January 2026 expiry cycle. 

Key Lot Size Changes Effective January 2026 

NSE declared that lot sizes for some of its key index derivatives would be reduced from the current levels. Nifty 50 lot size will be reduced from 75 to 65, Nifty Bank from 35 to 30, Nifty Financial Services from 65 to 60, and Nifty Midcap Select will change from 140 to 120.  

The lot size for Nifty Next 50 remains unchanged. These revisions will be applicable from the monthly and weekly contracts starting in January 2026. 

Until the expiry on December 30, 2025, all existing contracts will continue with the current lot sizes. Weekly contracts expiring on December 23, 2025, will be the last to follow the existing structure. 

Transition Schedule and Far-Month Contracts 

The updated lot sizes will be reflected in the January 6, 2026, weekly expiry and the January 27, 2026, monthly expiry. NSE also confirmed that quarterly and half-yearly contracts will adopt the new lot sizes from December 30, 2025. The March 2026 contract, originally introduced as a quarterly expiry, will now be treated as a far-month contract effective from this date. 

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Conclusion 

The NSE's decision to revise lot sizes aims to improve market efficiency and manageability for traders. These revisions will officially take effect following the December 2025 contract expiry and apply across weekly, monthly, quarterly and half-yearly index derivative contracts from January 2026 onward. 

Disclaimer: This blog has been written exclusively for educational purposes. The securities or companies mentioned are only examples and not recommendations. This does not constitute a personal recommendation or investment advice. It does not aim to influence any individual or entity to make investment decisions. Recipients should conduct their own research and assessments to form an independent opinion about investment decisions. 

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