IISL pools the index development efforts of CRISIL and NSE into a coordinated whole - India's first specialised company focused upon the index as a core product . IISL has the following objectives:

• To develop, construct and maintain indices on Indian equities that serve as useful market performance benchmarks and are the underlying indices for derivatives trading



• To provide data and information on the trading activity in the Indian stock markets

All the erstwhile indices of NSE and CRISIL, such as Nifty, Nifty Junior, Defty, CRISIL 500, CRISIL Midcap 200 index etc. have been transferred to IISL which now maintains, develops, compiles and disseminates the indices.

The indices of IISL are now known under the following names:

S.No.	Old Name	New Name
1	Nifty	S&P CNX Nifty
2	Defty	S&P CNX Defty
3	Crisil 500 Equity Index	S&P CNX 500 Equity Index
4	Nifty Junior	CNX Nifty Junior
5	Crisil Midcap 200	CNX Midcap 200 Index*
6	Crisil PSE	CNX PSE Index
7	Crisil MNC	CNX MNC Index

PSE indicates Public Sector Enterprises
MNC indicates Multinational Corporation
* CNX Midcap 200 Discontinued from July 18, 2005