The BSE Sensex experienced significant price fluctuations during the closing auction session on August 27, 2026, coinciding with the monthly expiry of Futures and Options (F&O) contracts.
Market participants observed wild swings in index values as traders squared off positions, a common occurrence during the final minutes of trading on the last Thursday of the month.
The volatility highlights the impact of derivative expiry cycles on market stability, as institutional and retail investors adjusted their portfolios before the market closed for the day.