The National Stock Exchange, through a circular, has decided to exclude 50 stocks from the Futures & Options segment. Most of the stocks were seen under pressure in today's trading session.

These firms, including Alok Textiles, Arvind, Ballarpur Industries, Bata India, Gateway, GNFC, Jet Airways, MindTree, NDTV, Network 18, Reliance Industrial Infrastructure, S. Kumars, Strides Arcolab, TVS Motor, UTV Software and Wockhardt. Traders will not be able to trade in F&O segment in these stocks after the expiry of contracts for existing months.

The stock exchange has also revised the eligibility criteria for stocks to be included in F&O segment. Stocks would be chosen among the list of top 500 stocks in terms of average daily market capitalization and average daily traded value during last six months of trading. The median quarter sigma order of stock is required to be more than Rs 5 lakh.

Similarly, any firm would continue to be under F&O stock if it holds share worth Rs 60 crore. Its stock's median quarter-sigma order size over the last six months should be more than Rs 2 lakh. Any firm once excluded from the list of F&O would be considered for re-inclusion after a gap of one year.