The Sensex has rebounded into the positive zone and is now up 82 points at 16,422.The NSE Nifty is up 35 points at 4,900.Infosys and Satyam have surged over 3% each to Rs 1,466 and Rs 419, respectively. TCS has rallied over 2% to Rs 872.Hindalco has gained 2.3% at Rs 205. NTPC, Tata Steel and ONGC have moved up around 2% each to Rs 194, Rs 794 and Rs 977, respectively.Hindustan Unilever and Wipro advanced 1.7% each to Rs 233 and Rs 424, respectively. Cipla and Larsen & Toubro have added 1.3% each to Rs 205 and Rs 3,265, respectively.ICICI Bank has plunged 3.5% to Rs 937. HDFC Bank has slipped 1.3% to Rs 1,340.Bharti Airtel has dropped nearly 2% to Rs 755.