Investor wealth swelled by over Rs 1.27 lakh crore Monday as thebenchmark index, Sensex, boosted by strong corporate earnings and positiveglobal cues, surged over 400 points to settle above the 15,000 mark.

The total investors' wealth, measured in terms of combined marketcapitalisation of all the listed companies, has increased by Rs 1,27,712.69crore to Rs 49,70,461 crore.

The total market cap of all the listed companies stood at Rs 48,42,748.31 croreat the end of trade on Friday last week.

The 30 Sensex companies, which account for about 46 per cent of the totalmarket capitalisation of all the companies, saw their combined market valuationrise by over Rs 70,203.98 crore.

The combined market capitalisation of the 30-blue chip stocks rose to Rs22,84,569.09 crore today from Rs22,14,365.11 crore on July 17.

The 30-share Bombay Stock Exchange, Sensex, surged 446 points to 15,191.01. Thegains in today's trade was mainly driven by Tata Consultancy Services whichclimbed as much as 15 per cent on strong earnings posted by the company in thesecond quarter.

In terms of market capitalisation, RIL, the country's most valued firm addedover Rs 15,305 crore in a single day

taking its market capitalisation to Rs 3,19,597.91 crore at the end of trade.

The RIL scrip gained over five per cent to end at Rs 2,030 on the BSE.

RIL was followed by ONGC whose valuation stood at Rs 2,26,848.82 crore, NTPC atRs 1,71,299.52 crore and Bharti Airtel at Rs 1,61,177 crore.