Two Anil Ambani group firms, Reliance Communications and Reliance Infrastructure, will move out of Bombay Stock Exchange''s blue chip index Sensex in August.

The changes would be effective from August 8, Bombay Stock Exchange (BSE) said in a statement on Friday.

Coal India shares have been doing well since the company was listed in November last year and has become the second most valued firm after Reliance Industries.

Last week, Coal India's market valuation surged to Rs. 2,55,338.85 crore.

On the other hand, shares of RCom and RInfra have not been performing well on the stock market.

Apart from Sensex, there would be changes in BSE-100, BSE-200, BSE-500 and sectoral indices, among others.

Eight companies including IndusInd Bank, Titan Industries, Canara Bank, Adani Power and Federal Bank would be making their entry into BSE-100 from August 8.

Entities that would move out of this index include Indian Hotels Company, Torrent Power, MMTC, Financial Technologies and IVRCL.

The decision to revise constituents of various BSE indices was taken by the Index Committee of the Exchange, during their meeting held on Friday.