The Securities and Exchange Board of India (SEBI) has proposed limiting the expiry days of equity derivatives contracts to either Tuesday or Thursday. This initiative aims to standardize expiration schedules across exchanges, avoid Monday and Friday expiries, and reduce concentration risk. The proposal comes after the National Stock Exchange (NSE) announced plans to shift the expiry day for Nifty index derivatives to Monday, effective April 4, 2025. However, this implementation has been deferred following SEBI's consultation paper. Currently, NSE's derivatives contracts expire on Thursdays, while the Bombay Stock Exchange (BSE) has its weekly contracts expiring on Tuesdays. SEBI's consultation paper also suggests spacing out expiry days to reduce market concentration risks and mandates exchanges to seek prior approval for modifying contract expiries or settlement dates. Monthly contracts are proposed to expire mid-month. Public feedback on the proposal is invited until April 17, 2025.