NSE Shifts Expiry Date: Even as the domestic stock market continues to battle a storm, the exchanges seem to be in a completely different tug-of-war to gain market share. Earlier this week, the National Stock Exchange (NSE) shifted expiry dates for all F&O contacts and indices from Thursday to Monday, starting April 4. Interestingly, just 2 months ago, its rival, Bombay Stock Exchange (BSE) shifted its expiry date to Tuesday and Friday.