The Sensex is now down 530 points at 18,133.The NSE Nifty is down 163 points at 5,321.All index stocks are still in negative zone with losses in excess of 1% each.Infosys and Bharti Airtel have slumped over 5% each to Rs 1,530 and Rs 889, respectively.Wipro and Satyam have plunged nearly 5% each to Rs 432 and Rs 417, respectively.Hindalco has tumbled over 4% to Rs 174. TCS, Tata Motors and Ranbaxy have dropped around 3.7% each to Rs 913, Rs 727 and Rs 373, respectively.DLF and Maruti have slipped 3.4% each to Rs 860 and Rs 843, respectively.ITC, ONGC and Tata Steel have declined nearly 3% each to Rs 200, Rs 1,043 and Rs 794, respectively.Reliance and Bajaj Auto have shed 2.7% each at Rs 2,545 and Rs 2,340, respectively.ICICI Bank, HDFC, Grasim, Mahindra & Mahindra, NTPC and Reliance Energy are down around 2.5% each.The market breadth is negative - out of 2,515 stocks traded so far, 1,471 have declined, 1,002 have advanced and 42 are unchanged.