As per SEBI guidelines, the National Stock Exchange of India (NSE) has revised market lot sizes for index derivatives, effective from April 25, 2025. Below are the key changes:

Revised Market Lot Sizes:

Unchanged Lot Sizes:

Key Notes:

• For BANKNIFTY and MIDCPNIFTY, the market lot size will not be revised for existing monthly expiries up to June 2025. The adjustments begin with the July 2025 expiry.

• All BANKNIFTY and MIDCPNIFTY quarterly contracts available for trading from April 25, 2025, onwards will be with the revised market lot size.

• No day spread order book will be available for the combination contracts of May 2025 – July 2025 and June 2025 – July 2025 expiries.

• New BANKNIFTY and MIDCPNIFTY contracts generated from the end of April 24, 2025, and available for trading from April 25, 2025, will reflect the revised lot sizes.

Plan of Action

• Banknifty Contracts with the following expiries will be blocked

  • 25 Sep 2025

  • 24 Dec 2025

  • 26 Mar 2026

The blocking will be in effect from April 2 to April 24, 2025.

• Open positions in BANKNIFTY or MIDCPNIFTY contracts beyond July 2025 must be maintained in multiples of 35 (BANKNIFTY) and 140 (MIDCPNIFTY).

• If the position is not in the revised multiple, necessary action must be taken to align it with the updated lot size.

• If no action is taken, the RMS team will initiate the required adjustments to align with the new lot sizes.

• All changes must be completed before April 24, 2025, to avoid any intervention.

For more details, refer to the NSE circulars on Index & Stock Derivatives.