Investors lost close to Rs one lakh crore (Rs 1 trillion) on Monday as the market gave a thumbs down to the interim Budget FY'2009-10, which failed to provide any sops for key sectors.

After two weeks of pre-budget rally, the benchmark index Sensex on Monday nosedived over 300 points to 9,305.45 points, with metals and realty stocks witnessing huge sell-offs.

Combined market capitalisation of all listed companies plunged to Rs 29,79,509.44 crore (Rs 29,79,5.09 billion) at the end of trading on Monday from Rs 30,71,114.61 crore (Rs 30,71,1.14 billion) on Friday last week, losing over Rs 91,000 crore (Rs 910 billion).

Analysts believe that the market would continue on its downward spiral from here as the interim budget dashed investors' hopes, which triggered a major sell off on the two bourses.

"The markets have been disappointed as a section of the industry and market was expecting that there would be some kind of stimulus from the government in view of slowing down of the industrial growth (negative two per cent in December 08) and exports," brokerage firm Bonanza Portfolio Director Shiv Kumar Goel said.

Further, the 30-Sensex companies, which account for over 47 per cent of the total marketcap of all the companies, saw their combined market valuation falling by over Rs 48,400 crore (Rs 484 billion) in a single day.

The benchmark index Sensex settled down 329 points or 3.29 per cent at 9,305.45 on massive buying by funds.

The combined marketcap of the 30 bluechip stocks dropped to Rs 14.28 lakh crore from Rs 14.76 lakh crore last week.

Among the Sensex companies, Jaiprakash Associates [Get Quote], Reliance Infrastructure, Reliance Industries [Get Quote] and ICICI bank [Get Quote] were the major losers with their stock prices falling between four and eight per cent.