The Sensex is now down 158 points at 15,929.The NSE Nifty is down 24 points at 4,805.Tata Motors and Satyam have plunged 4.7% each to Rs 647 and Rs 394, respectively. TCS has shed 2.5% at Rs 858.Infosys has slipped 2% to Rs 1,465, and Larsen & Toubro has shed 1.8% at Rs 2,992.Reliance, SBI and ICICI Bank have slipped around 1.5% each at Rs 2,262, Rs 1,687 and Rs 831, respectively.Jaiprakash Associates and HDFC have also declined around 1.5% each at Rs 223 and Rs 2,623, respectively.Reliance Energy, Reliance Communications and Ranbaxy are down 1.3% each at Rs 1,280, Rs 519 and Rs 443, respectively.Hindalco has surged 5.5% to Rs 171. ITC has moved up 1.7% to Rs 199.Cipla and Ambuja Cements have gained 1.5% each at Rs 209 and Rs 124, respectively.The market breadth has turned positive - out of 2,645 stocks traded so far, 1,348 have advanced, 1,241 have declined and the balance are unchanged.