BSE share price falls after SEBI nod for Thursday expiry, NSE gets Tuesday

BSE share price: Shares of stock exchange BSE (formerly Bombay Stock Exchange) were trading in the negative territory on Wednesday, June 18, after the capital markets regulator, the Securities and Exchange Board of India (SEBI), assigned Thursday as its expiry day for equity derivatives contracts. The NSE has received a nod to shift its expiry day to Tuesday.

This development marks a reversal of the current schedule, where BSE holds F&O expiries on Tuesdays and NSE on Thursdays.

BSE share price

The stock was down 1.10% to ₹2,635 apiece on the National Stock Exchange (NSE) at 2:36 pm. Intraday, it fell as much as 6.17% to ₹2,500.

The new schedule will apply to new equity derivatives contracts expiring on or after September 1, 2025.

Contacts expiring before September 1 will follow the existing expiry schedule – except for long-dated index options contracts for which stock exchanges would suitably realign the expiry day.

Puneet Sharma, CEO & Fund Manager at Whitespace Alpha - CAT 3, AIF, said that the change of equity derivatives expiries presents both challenges and strategic opportunities for India's financial markets.

"This divergence creates an interesting dynamic—while NSE moves closer to global standards, BSE now has a chance to differentiate itself, though it may face liquidity fragmentation. The real impact will be felt across the ecosystem: institutional investors will need to adapt to dual settlement cycles, brokers must update collateral and risk systems, and retail participants will require guidance to navigate the new landscape," he said.

Stating that there might be clear benefits, he said, "Spreading open interest across two days could reduce intraday volatility, giving traders better risk control. We will likely see increased arbitrage activity between exchanges, and innovative hedging strategies may emerge as market participants adjust. What's certain is that adaptability will be key."

NSE and BSE are likely to issue detailed circulars soon, mentioning the operational guidelines and implementation process.