The Economic Times

New CAS rules decoded: What Sebis revised framework means for stock market traders

Sebi has revised the Closing Auction Session (CAS) framework after receiving more than 20,000 comments from stakeholders. The updated rules introduce a 10-minute closing auction, restore the VWAP method for F&O expiry settlement prices and clarify order transfers. Most changes will take effect on December 7, 2026.