On July 12, the National Stock Exchange (NSE) announced a change to the expiry dates for Bank Nifty and Nifty Midcap Select futures and options contracts.
Weekly F&O contracts for Bank Nifty will now expire on Wednesdays instead of Thursdays as of September 4, 2023.
On September 6, 2023, the first Wednesday weekly expiry is slated to occur.
The expiry dates for the monthly and quarterly Bank Nifty contracts have not changed, though. These agreements will expire on the fourth or last Thursday of each month.
The new schedule for NSE's F&O contracts essentially looks like this: the Nifty Midcap Select on Monday, the Nifty Financial Services on Tuesday, the Bank Nifty on Wednesday, and the Nifty 50 on Thursday.