Overview

• From September 1, 2025, all new NSE equity derivatives will expire on Tuesdays and BSE contracts on Thursdays, with existing contracts following the current schedule until August 31.
• BSE will pause the launch of new weekly index futures from July 1 to facilitate a smooth transition to Thursday expirations.
• Goldman Sachs and Motilal Oswal forecasts indicate BSE could see its index options market share fall from 22.6% to about 18–19% and its FY26 EPS trimmed by up to 2%.
• Market participants say NSE’s Tuesday expiries will lessen weekend time decay for options and drive higher trading volumes at the start of the week.
• BSE’s CEO has adopted a “wait and watch” approach on volume effects, with experts viewing the change as a reallocation rather than an overall decline in derivatives activity.