The Sensex has slipped into the negative zone and is now down five points at 15,460.NTPC has soared 2.5% to Rs 186. Cipla has surged 2% to Rs 183. Maruti has slipped 1.5% to Rs 880. Reliance Energy, Wipro and Satyam are up 1% each at Rs 831, Rs 470 and Rs 454, respectively. Hindalco has dropped 2% to Rs 154. Maruti and Ranbaxy have shed 1.7% each to Rs 878 and Rs 400, respectively. Bharti Aritel has slipped 1.5% to Rs 846.