Method of Computation

CNX 100 is computed using market capitalisation weighted method, wherein the level of the index reflects the total market value of all the stocks in the index relative to a particular base period. The method also takes into account constituent changes in the index and importantly corporate actions such as stock splits, rights, etc without affecting the index value.


Base Date and Value

The CNX 100 Index has a base date of Jan 1, 2003 and a base value of 1000.


Criteria for Selection of Constituent Stocks

CNX 100 index would comprise of the securities, which are constituents of S&P CNX Nifty, and CNX Nifty Junior. In other words this index is a combination of the S&P CNX Nifty and CNX Nifty Junior. Any changes i.e. inclusion and exclusion of securities in S&P CNX Nifty and CNX Nifty Junior would be automatically mirrored in this new index.

From June 26, 2009, CNX 100 is computed using Free Float Market Capitalisation weighted method, wherein the level of index reflects the free float market capitalisation of all stocks in Index.