The Sensex is now down 120 points at 13,645.ONGC has dropped 2.5% to Rs 900. Ranbaxy has slipped 1.7% to Rs 382.Bharti Airtel, TCS and BHEL have shed 1.3% each to Rs 805, Rs 1,251 and Rs 2,436, respectively.HDFC, ACC, Infosys and Satyam are down 1% each at Rs 1,590, Rs 876, Rs 1,981 and Rs 452, respectively. Hero Honda has advanced over 1% to Rs 688.