The Sensex is now up 252 points at 20,183.ONGC has zoomed over 4% to Rs 1,244, and Bharti Airtel has soared nearly 3% to Rs 999.HDFC, HDFC Bank and Grasim have surged 2.4% each to Rs 2,941, Rs 1,734 and Rs 3,698, respectively.Reliance has rallied 2% to Rs 2,881. Cipla and ACC have gained 1.8% each at Rs 196 and Rs 1,082, respectively.ICICI Bank, Maruti and Bajaj Auto have added 1.6% each to Rs 1,294, Rs 1,062 and Rs 2,755, respectively.Tata Steel, Hindalco and SBI have gained 1.3% each at Rs 845, Rs 196 and Rs 2,457, respectively.Infosys has slipped 1.4% to Rs 1,724.Out of 2,849 stocks traded so far, 2,226 have advanced, 585 have declined and 38 are unchanged.