The National Stock Exchange (NSE) announced an extension of trading hours for its equity derivatives segment, moving the closing time from 3:30 PM to 3:40 PM, effective from August 3, 2026. This change aims to provide traders with additional time for transactions. The pre-open session will remain unchanged, starting at 9:00 AM and concluding at 9:08 AM. The normal market session will commence at 9:15 AM. Additionally, the trade modification window will still be available until 4:15 PM. The methodology for calculating closing prices will not change; it will continue to utilize the volume-weighted average price based on trades executed during the last half hour of trading, specifically from 3:10 PM to 3:40 PM. The NSE will also facilitate testing of these changes during mock trading sessions, with further details to be provided later. Furthermore, a security will not be eligible for the Closing Auction Session (CAS) if excluded from the equity derivatives segment on both exchanges, but will remain eligible if part of at least one exchange.