In a recent move from July 7, 2023, the National Stock Exchange will no longer allow Bank Nifty Futures and Options (F&O) to expire on a Thursday. All current contracts with a Thursday expiry will be amended at the close of Market Hours on July 6, 2023 to reflect the new Friday expiration date. According to a letter sent out by exchange to its members, the first Friday expiration date will be July 14, 2023.

Effective with the week of July 9, Now NSE will have a F&O expiry every day of the week except than Monday. Tuesday is the Nifty Financial expiration, Wednesday is Nifty Midcap Select, Thursday is Nifty 50, and today is Bank Nifty's turn. Earlier the expiration date of the Nifty Financial contract was also moved from Thursday to Tuesday allegedly so that traders wouldn't get confused and divert their attention on three different contracts on the same day. Following the changeover, there was a noticeable increase in the trading volume of NSE's Nifty Financial.

Why NSE shifted Bank Nifty Expiry

Almost 3 weeks before BSE's newly introduced F&O contracts-weekly Sensex and Bankex options  with a Friday expiry. In fact, BSE picked Friday so that it wouldn't conflict with NSE's F&O contracts' expiration date. Trading Has Commenced with a record high of Rs 69,422 crore in turnover, comprising Rs 69,287 crore in options and Rs 135 crore in futures, volume appears to be picking up steam.  This decision from NSE will have an immediate and negative effect on BSE volumes for sure however we have to wait and watch about BSE reaction on the same.