India Index Services & Products Limited (IISL), a joint venture between NSE and CRISIL Ltd. (formerly the Credit Rating Information Services of India Limited), was setup in may 1998 to provide a variety of indices and index related services and products for the Indian capital markets.It has a licensing and marketing agreement with Standard and Poor's (S&P), the world's leading provider of investible equity indices, for co-branding equity indices.

IISL provides a broad range of services, products and professional index services. It maintains over 80 equity indices comprising broad-based benchmark indices, sectoral indices and customised indices. Many investment and risk management products based on IISL indices have been developed in the recent past, within India and abroad. These include index based derivatives traded on NSE, Singapore Exchange (SGX) and Chicago Mercantile Exchange (CME) and a number of index funds and exchange traded funds.