The Sensex has slipped back into the negative zone and is now down 28 points at 13,128.Infosys has gained 1.8% at Rs 2,140. HDFC Bank and ICICI Bank have advanced nearly 1% each to Rs 1,004 and Rs 777, respectively.Hero Honda has tumbled over 3% to Rs 720. HDFC and Reliance Communications have declined nearly 2% each to Rs 1,530 and Rs 380, respectively.Reliance and ONGC are down over 1% each to Rs 1,275 and Rs 847, respectively.NTPC, Tata Motors, Grasim, Dr.Reddy's and ACC are the other major losers.