The Sensex is now down 149 points at 18,910.Infosys has plunged 3.5% to Rs 1,860.Mahindra & Mahindra, ONGC and Hindustan Unilever have tumbled over 3% each to Rs 808, Rs 1,154 and Rs 213, respectively.Bharti Airtel and Larsen & Toubro have dropped 2.8% each to Rs 1,095 and Rs 3,320, respectively.SBI, Bajaj Auto and Hindalco have shed around 2.5% each to Rs 1,905, Rs 2,514 and Rs 184, respectively.Tata Steel, Grasim, Maruti and ITC have slipped over 2% each to Rs 890, Rs 3,723, Rs 1,135 and Rs 183, respectively.HDFC Bank, BHEL and Reliance have declined around 1.7% each to Rs 1,465, Rs 2,373 and Rs 2,622, respectively.ICICI Bank has surged 2.5% to Rs 1,123. Satyam has gained nearly 2% at Rs 451.Out of 2,753 stocks traded so far, 1,693 have declined, 986 have advanced and 74 are unchanged.