The Sensex is now down 159 points at 13,407.ICICI Bank has shed 3.3% to Rs 882. ONGC has dropped 3% to Rs 891.BHEL, SBI, Grasim and Dr.Reddy's have slipped around 2% each to Rs 2,198, Rs 1,152, Rs 2,771 and Rs 784, respectively.NTPC and Reliance Energy have declined 1.8% each to Rs 133 and Rs 506, respectively.HDFC and TCS have shed 1.6% each to Rs 1,536 and Rs 1,235, respectively.Out of 2,647 stocks traded so far, 1,562 have declined, 1,025 have advanced and 60 are unchanged.