The Securities and Exchange Board of India (SEBI) announced that the closing auction session (CAS) will remain a permanent feature of the stock market, following its technical success during recent events. SEBI Chairman Tuhin Kanta Pandey highlighted the smooth implementation of CAS, especially during the recent MSCI rebalancing exercise, but acknowledged ongoing liquidity challenges. The announcement was made on September 10, 2026, addressing concerns from market participants.
SEBI introduced the closing auction session to enhance price discovery and market efficiency at the end of trading days. The mechanism was tested during the MSCI rebalancing, a critical event that adjusts index constituents and often causes volatility. According to livemint.com, Pandey stated that while the technical aspects of CAS functioned well, liquidity issues remain a significant concern, prompting SEBI to reconsider how settlement prices for derivatives are determined in the auction session.
The decision to retain CAS aligns with global practices where closing auctions help establish fair closing prices and reduce volatility. However, liquidity challenges in the Indian market have raised questions about the session's effectiveness in all scenarios. SEBI's move to rework settlement price determination for derivatives reflects efforts to balance technical success with practical market dynamics. The CAS mechanism's continuation marks a key regulatory step following similar implementations in other major markets.
SEBI's next steps include revising the settlement price methodology for derivatives linked to the closing auction session. The regulator's focus on refining CAS comes as it prepares for the next major market event, ensuring smoother price discovery and better liquidity management. The MSCI rebalancing exercise served as a critical test case, with SEBI confirming the session's permanence on September 10, 2026.