Balrampur Chini, GMR Airports, GNFC and RBL Bank were added to the list on Wednesday as the open interest of their F&O contracts reached 109.5%, 96.7%, 98.8% and 107.5%, respectively. The ban will be lifted once the position falls below 80%. Traders will get penalised for buying or selling these securities. They will be available for trading in the cash market. The open interest for F&O contracts of Aditya Birla Fashion and Ashok Leyland declined below the 80% limit to 75% and 79.2%, respectively. Hence, they were exited from the list on Wednesday. The National Stock Exchange updates the list of securities on the F&O ban list daily. This list serves as a guide for traders and investors in the market. Traders who trade in indices do not encounter a situation of security ban.