NSE Cuts Lot Sizes for Nifty, Bank Nifty, and Key Index Derivatives from October 28

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Synopsis: The NSE has revised market lot sizes for key index derivatives effective October 28, 2025.
Nifty 50, Bank Nifty, Nifty Financial Services, and Nifty Mid Select contracts will see reduced lot sizes,
making them more affordable and aligned with global standards.

Mumbai: The National Stock Exchange (NSE) has announced revisions in the market lot sizes for four major index futures and options contracts, effective October 28, 2025.

The Nifty 50 lot size has been reduced from 75 to 65, while the Nifty Bank lot size has been cut from 35 to 30. The Nifty Financial Services lot size is now 60 (down from 65), and the Nifty Mid Select index lot size has been revised from 140 to 120. The Nifty Next 50 contracts remain unchanged.

Investors can continue trading with the current lot sizes until the December 30, 2025 expiry. From that date onwards, all new contracts of any maturity will follow the revised sizes.

Important contract expiries:

• Weekly & monthly Nifty contracts → Expire on December 23, 2025.
• Monthly Nifty & Bank Nifty contracts → Expire on December 30, 2025.
• All new contracts post these dates will adopt revised lot sizes.

The NSE explained that lot size revisions are undertaken to:

• Keep contract values within a standard affordable range.
• Enhance market efficiency & liquidity.
• Make contracts accessible to a wider set of investors.

Additional Insight:
Derivatives are leveraged instruments, meaning traders do not pay the full contract value upfront. Instead, margins are based on the lot size. Hence, a smaller lot size lowers margin requirements, reducing barriers for retail participation while maintaining risk control.

Note: Traders and brokers are advised to inform clients with open positions about the upcoming changes to avoid any confusion during transition.