The National Stock Exchange of India Ltd (NSE) remained the world's largest derivatives exchange for the second consecutive year in 2020 in terms of number of contracts traded, according to the Futures Industry Association (FIA). In addition, the bourse has been ranked fourth in the world in cash equities by number of trades by the World Federation of Exchanges (WFE) for calendar year 2020, NSE said in a statement on Thursday. The exchange said it has been focused on building robust markets for all asset classes and had launched a host of new products and services last year. In the capital market segment, NSE has listed T-bills (Treasury Bills) and SDLs (State Development Loans) facilitating investors to transact in these securities, in addition to the existing dated Government Securities (G-sec) available for trading.