The Sensex is now down 80 points at 13,206.Tata Motors has plunged 3.7% to Rs 761. HDFC Bank has dropped 3% to Rs 982.Larsen & Toubro has shed nearly 2% to Rs 1,602, and NTPC has slipped 1.4% to Rs 143.HDFC, Infosys and Maruti are down 1.2% each at Rs 1,574, Rs 2,070 and Rs 830, respectively.Satyam has advanced 1.5% to Rs 471, and Tata Steel has moved up over 1% to Rs 444.Out of 2,423 stocks traded so far, 1,396 have declined, 952 have advanced and 75 are unchanged.