The Sensex opened with a negative gap of 146 points at 15,778, and soon touched a low of 15,739. The index has recovered from the lower levels and is now down 12 points at 15,912.The NSE Nifty is down eight points at 4,792.Larsen & Toubro (L&T) has surged 4% to Rs 2,837. Grasim has gained 2% at Rs 2,795.Cipla, ONGC and NTPC are up around 1% each at Rs 203, Rs 978 and Rs 187, respectively.Bharti Airtel has plunged 3.5% to Rs 775. HDFC Bank has dropped 2% to Rs 1,285.Satyam and HDFC have slipped 1.5% each to Rs 402 and Rs 2,530, respectively.ICICI Bank, Tata Motors and Maruti are down over 1% each at Rs 861, Rs 666 and Rs 884, respectively.