NSE announces change in expiry days for Nifty Bank, Nifty Midcap Select Index
"All weekly contracts shall expire on Wednesday of every week excluding the expiry week of the monthly contract. If Wednesday is a trading holiday, then the expiry day is the previous trading day," NSE said in a circular. For monthly and quarterly contracts of the widely-tracked banking index, there is no change and will continue to expire on the last Thursday of the expiry month.