The top three information technology firms, TCS, Infosys and Wipro today surged over five per cent on the Bombay Stock Exchange, while Satyam shares took a severe beating and plunged over 70 per cent.

The BSE IT index soared to an intra-day high of 2,205.60 points, up 3.63 per cent and was trading up nearly two per cent at 2,166.86 points in the pre-noon trade.