As the NSE moves the expiration date to Monday, BSE stock plummets 9%.

Following the National Stock Exchange's decision to move the expiration date of all F&O contracts to Monday, shares of Asia's oldest stock exchange, BSE Ltd., fell more than 9% in the morning session of March 5.

Beginning on April 4, all Nifty index weekly futures and options (F&O) contracts will expire on Mondays rather than Thursdays. The exchange stated that all Nifty F&O contracts would expire on the last Monday of the expiry month rather than Thursday.