The Sensex is now down 199 points at 17,361.Reliance Energy and Bharti Airtel have plunged 3% each to Rs 1,290 and Rs 940, respectively.HDFC and NTPC have shed 2.5% each to Rs 2,337 and Rs 197, respectively.Mahindra & Mahindra, Bajaj Auto, Grasim, Satyam, Reliance and Maruti have slipped 2% each to Rs 712, Rs 2,460, Rs 3,430, Rs 451, Rs 2,421 and Rs 1,054, respectively.Wipro, BHEL, ONGC and Larsen & Toubro have dropped 1.6% each to Rs 492, Rs 2,018, Rs 1,090 and Rs 2,975, respectively.Ambuja Cements has soared nearly 4% to Rs 145.