Mumbai, May 30 -- The National Stock Exchange (NSE) has announced changes to trading modalities in the equity derivatives segment, extending the normal market closing time for futures and options (F&O) contracts by 10 minutes from August 3, 2026, following the introduction of a Closing Auction Session (CAS) in the equity cash segment.

According to an NSE circular, the normal market close time for equity derivatives will be extended to 3:40 pm from the current 3:30 pm, while the trade modification end time will remain unchanged at 4:15 pm.

The move is aimed at aligning derivatives trading with the newly introduced Closing Auction Session in the cash market, which will run from 3:15 pm to 3:35 pm and determine the official closing price o...