The Sensex has rebounded into the positive zone and is now up 20 points at 13,328.Larsen & Toubro has surged 2.7% to Rs 1,615, and ACC has rallied 2.5% to Rs 772.Grasim has soared over 2% to Rs 2,125. HDFC has advanced 1.7% to Rs 1,600, and BHEL has added 1.5% to Rs 2,264.Dr.Reddy's, Bharti Airtel, Gujarat Ambuja and Cipla are up over 1% each to Rs 690, Rs 790, Rs 109 and Rs 237, respectively.ITC has slipped over 2% to Rs 146. HDFC Bank has shed 1.5% to Rs 1,008.Infosys, Tata Motors and Satyam are down 1% each to Rs 2,096, Rs 797 and Rs 462, respectively.Out of 2,285 stocks traded so far, 1,151 have declined, 1,033 have advanced and 101 are unchanged.