BSE share price tanks as Indian bourses exchange futures and options expiry day

BSE stock slipped by 6 per cent on the National Stock Exchange on Wednesday morning following the confirmation of a change in expiry day for equity derivatives contracts.

On Tuesday evening, the BSE (erstwhile Bombay Stock Exchange) announced that the Securities and Exchange Board of India (Sebi) approved Thursdays as the expiry day for derivative contracts, triggering a change from the current Tuesdays.

“Sebi has agreed to the expiry day proposed by BSE (i.e., Thursday). Since there would be a change in the expiry day of derivatives contracts from the present (Tuesday),” BSE said in a circular on Tuesday.

“Sebi has agreed to the expiry day proposed by BSE (i.e., Thursday),” read the BSE circular.

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BSE also noted more changes for “smooth transition” since “there would be a change in the expiry day of derivatives contracts from the present (Tuesday).”

For new contracts, these include:

“To continue with present expiry day for derivative contracts which expire on or before August 31, 2025.”

“To change the expiry day of the derivatives contracts, which expire on or after September 01, 2025, to Thursday. Further, from September 01, 2025, the monthly contracts would expire on the last Thursday of the month.”

“To not introduce any fresh weekly contracts on index futures from July 01, 2025…”

Along with these, BSE stated that for existing contracts, it would keep the expiry day of derivatives contracts unchanged for already introduced contracts, “with the exception of long-dated index options contracts for which the Stock Exchanges to suitably realign expiry day as per the practice followed in past.”

This is in line with Sebi in May pushing that all expiry dates of equity derivates contracts should be limited to other Tuesdays or Thursdays, triggering a sort of tussle for the dates between the NSE and the BSE.

However, the changes seem to have rattled the market. Pairing with the fact that weekly options contracts were cut down to one benchmark index per exchange back in October, fears of the BSE market share dwindling quickly shifted investor sentiment to sell on Wednesday morning.

Last week, on June 10, BSE shares hit an all-time record high of ₹3,030 piece. When it closed at ₹3,005.40 per share on that day, BSE stock had jumped a staggering 239 per cent year-on-year.

As of June 18, 2025 (Wednesday morning’s) low of ₹2,500 apiece, BSE shares are still trading more than 174 per cent higher than last year’s price of ₹912.16 (June 18, 2024 close).

BSE stock was rallying on market rumours of an impending IPO from the National Stock Exchange, but market watchers had since then warned that it might not happen soon.

In a separate circular, the NSE also confirmed that Sebi gave them the nod to shift its equity derivatives contracts expiry day to Tuesday.

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