Gas Authority of India Limited (GAIL), India largest gas distribution company, will replace Jaiprakash Associate in SENSEX, the 30 stock benchmark index of BSE, from 9th Dec 2011.

At the current market price of Rs.60 the market value of JP Associate stands at Rs. 12,900 crores.
GAIL on the other hand has the current market capitalization of Rs. 48,700 crores, almost four times the size of JP Associate.