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

6/18/20252 min read

🔄 What’s Changing & When

🎯 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

✅ What Traders & Investors Should Watch

  1. Volume shifts in weekly Nifty options post-change—NSE uptake vs. BSE decline.

  2. BSE stock performance—support/resistance levels and technical signals.

  3. Broker sentiment and transaction fee trends (especially NSE revenues).

  4. 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.