Mumbai, June 17 -- The National Stock Exchange is set to shift its weekly expiry for Nifty options from Thursday to Tuesday after getting the regulatory approval, giving it an opportunity to claw back share lost to rival BSE Ltd.

BSE, which had moved its Sensex options expiry to Tuesday from Friday earlier this year, has opted to shift it to Thursday, the exchange said in a notice citing communication with the Securities and Exchange Board of India (Sebi).

Sebi's 26 May circular requires stock exchanges to designate a single expiry day-either Tuesday or Thursday-for all equity derivative contracts, including weekly, monthly, quarterly and semi-annual expiries.

NSE submitted a formal request to the regulator to move its Nifty weekly opt...