The National Stock Exchange (NSE) on November 10, 2025, notified regarding the changes in the strike scheme and strike interval for Index Options Contracts on NIFTY50.
The following has been stated namely: -
• It has announced a revision in strike interval and strike scheme for Nifty50 Index Options effective November 17, 2025. For monthly and quarterly contracts, the strike interval will change from 100 to 25 points, and the strike scheme from 25-1-25 to 100-1-100, while 0DTE and weekly contracts will retain the existing scheme.
• The revised structure applies to all new and unexpired contracts created after end of day November 14, 2025, with necessary gap-filling strikes generated accordingly.
• The first expiry under the new scheme will be December 22, 2025. Members must update their trading systems by loading the latest ni_contract.gz and ni_spd_contract.gz files before trading on November 17, 2025.
[Notification no. - NSEIFSC/TRADE/2364]
