Mumbai, Aug. 31 -- The National Stock Exchange's newly introduced Closing Auction Session (CAS) recorded a turnover of Rs 39,718 crore on Monday, its first major index rebalancing day since the mechanism was launched in Indian capital markets.

The closing auction accounted for 22 per cent of NSE's total cash market turnover during the day, while more than 98,000 investors participated in the session. CAS turnover was around 42 times the turnover recorded in the previous trading session, according to an NSE press release.

The sharp rise in activity came as the MSCI August 2026 Index Review took effect at the close of trading on August 31. This was the first index rebalancing after the closing auction mechanism went live.

Index rebalanci...