New Delhi, Nov. 4 -- The National Stock Exchange (NSE) has introduced a pre-open session for the equity derivatives (F&O) segment starting from December 8, 2025. The pre-open session will be applicable for both single stocks and indices futures in the equity derivatives market.

The pre-open session will be conducted using a call auction mechanism for a duration of 15 minutes i.e., from 9:00 am to 9:15 am, NSE said. This 15-minute session will be split into three components:

Order Entry Period: 9:00 AM - 9:08 AM: Traders can place, modify, or cancel orders during this period. A system driven random closure will take place in this phase between the 7th and 8th minute. The random closure of equity segment pre-open and equity derivatives se...