The Sensex is now up 121 points at 15,625.Bharti Airtel and Reliance Energy have surged 2.5% each to Rs 835 and Rs 930, respectively. ICICI Bank has rallied 2.3% to Rs 915.ONGC has gained 1.7% at Rs 850, and Mahindra & Mahindra has advanced 1.3% to Rs 708.SBI, Hindustan Unilever, Reliance Communications and Hindalco are up over 1% each at Rs 1,666, Rs 215, Rs 536 and Rs 156, respectively.Cipla has shed 1.7% at Rs 169.Out of 2,776 stocks traded so far, 1,825 have advanced, 888 have declined and 63 are unchanged.