SEBI to roll out 20-minute closing auction for eligible F&O stocks from August 3, 2026

India’s market regulator SEBI will introduce a Closing Auction Session (CAS) for eligible Futures & Options (F&O) stocks from August 3, 2026, replacing the current continuous-trading close. The 20-minute auction will run with a 3% price band, while trading in stock and index derivatives will be extended by 10 minutes, with the close shifting from 15:30 to 15:40. The changes are aimed at making closing prices more transparent and representative, and do not reflect shifts in company fundamentals or broader macro policy.