The Sensex has moved back above the 17,000-mark, and is now down 575 points at 17,004.The NSE Nifty is down 176 points at 5,047.HDFC has tumbled nearly 7% to Rs 2,610. BHEL and ICICI Bank have slumped 6% each to Rs 2,145 and Rs 1,026, respectively.DLF has plunged 5.5% to Rs 738. SBI has dropped over 5% to Rs 2,002.NTPC has shed 4.5% at Rs 193. Reliance Energy, ITC and Bharti Airtel have slipped around 4% each to Rs 2,355, Rs 194 and Rs 794, respectively.Larsen & Toubro, HDFC Bank and Reliance Communications are down 3.5% each at Rs 3,398, Rs 1,402 and Rs 555, respectively.Maruti has soared 4.5% to Rs 906. Ranbaxy and Cipla have surged around 3% each to Rs 460 and Rs 213, respectively.Hindustan Unilever has moved up 3.7% to Rs 236. Satyam has added 2% to Rs 443.