The Sensex touched a high of 13,191 in the opening trades, and then slipped into red to a low of 13,105.The index has now rebounded into the positive zone and is up 13 points at 13,150.Reliance Energy has gained 1.7% at Rs 522. Hindalco and HDFC Bank are up over 1% each at Rs 185 and Rs 1,029, respectively.BHEL is up nearly 1% at Rs 2,405.Gujarat Ambuja and Satyam are the prominent losers.