MSCI rejig disrupts arbitrage playbook, fuels late-session volatility

MSCI index rebalancing on Monday saw sharp stock swings in the final minutes. Global funds adjusted holdings, impacting several stocks significantly during the new Closing Auction System. The Closing Auction Session accounted for a substantial portion of the day's total cash market turnover. Some large-cap stocks experienced unexpected declines without clear fundamental reasons. Traders and investors are now adapting to the new dynamics introduced by the auction system.