Extra Time! NSE extends F&O trading by 10 minutes. What changes for traders?

The NSE will introduce the Closing Auction Session (CAS) framework in the equity derivatives segment from August 3, 2026. While market closing time will be extended by 10 minutes to 3:40 pm, the key change is the adoption of an auction-based mechanism to determine closing prices, aimed at improving price discovery and aligning cash and derivatives market settlements.