Mumbai, May 22 -- The media reports suggested that SEBI may soon issue a circular formalising the expiry days for index derivatives across stock exchanges. According to the reports, NSE has submitted a proposal requesting Tuesday as its new expiry day.

As things stand, BSE's futures and options contracts expire on Tuesdays, while NSE contracts typically expire on Thursdays. SEBI's March 2025 consultation paper floated the idea of assigning specific days, Tuesday and Thursday, for different exchanges to prevent overlap and streamline trading operations.

If SEBI formally clears NSE's request to shift expiries to Tuesday, it could blur the competitive edge currently enjoyed by BSE's Tuesday contracts, possibly explaining the sharp dip in i...