Sebi approves NSE's expiry day change to Tuesday, BSE to Thursday
BSE’s change in expiry day will come into effect as of September 1, 2025. The exchange will not introduce any fresh weekly contracts on index futures from July 1, 2025.
FUTURES & OPTIONSINDIAN MARKET


🔄 What’s Changing & When
From September 1, 2025, SEBI has standardized the weekly expiry schedule for equity derivatives:
NSE will now expire weekly contracts on Tuesdays, replacing its current Thursday schedule economictimes.indiatimes.com+3newsonair.gov.in+3m.economictimes.com+3business-standard.com+12reuters.com+12m.economictimes.com+12.
BSE, which previously used Tuesdays, will shift its expiry to Thursdays newsonair.gov.in+2reuters.com+2livemint.com+2.
Existing contracts (until August 31, 2025) remain unaffected. Monthly contracts will expire on the last Tuesday (NSE) and last Thursday (BSE) each month m.economictimes.com+3reuters.com+3livemint.com+3.
🎯 Why SEBI Made the Move
To prevent overlapping expiry days, which can heighten volatility and cause operational issues.
SEBI’s May circular authorized only two weekly expiry options (Tue or Thu) and set limits on weekly contracts to enhance market stability and investor protection outlookbusiness.com+11m.economictimes.com+11reuters.com+11.
📊 Implications for the Exchanges
🟥 NSE
Gains a strategic advantage by offering expiry earlier in the week.
Targets recapturing market share lost to BSE during its Tuesday-weekly run—potentially reclaiming up to 5–10% share in Nifty options volume moneycontrol.com+2livemint.com+2outlookbusiness.com+2.
Much of its revenue—transaction fees—comes from F&O; this could bolster income .
🟦 BSE
Could lose volume as some traders may prefer NSE’s new Tuesday expiry.
Shares have already dropped ~5–6% in early trading, fueled by concerns over displacement in the derivatives market business-standard.com+12reuters.com+12economictimes.indiatimes.com+12.
Analysts flag potential 19% downside, with key technical resistance around ₹2,924 business-standard.com.
Motilal Oswal downgraded BSE to Neutral, lowering its target from ₹2,533 to ₹2,300 outlookbusiness.com.
✅ What Traders & Investors Should Watch
Volume shifts in weekly Nifty options post-change—NSE uptake vs. BSE decline.
BSE stock performance—support/resistance levels and technical signals.
Broker sentiment and transaction fee trends (especially NSE revenues).
Market reaction to Tuesday expiry timing: will weekend time decay shift behavior? timesofindia.indiatimes.combusiness-standard.commoneycontrol.com
🧭 Strategy Takeaways
Derivatives traders should reassess trading schedules—expiry day changes may skew volatility and P&L cycles.
Long-only investors in BSE shares should consider valuation risk; a downtrend below ₹2,500–2,600 could be meaningful.
Those involved in exchange-traded products or advisory should monitor shifts in open interest and volumes between Tuesday and Thursday sessions.