The Sensex is now down 151 points to 13,521.HDFC, Bajaj Auto and BHEL have dropped around 2.5% each to Rs 1,554, Rs 2,430 and Rs 2,490, respectively.ONGC, Tata Steel, Tata Motors and Satyam have slipped around 2% each to Rs 886, Rs 501, Rs 708 and Rs 453, respectively.HLL, Infosys and ACC have declined 1.8% each to Rs 205, Rs 2,040 and Rs 802, respectively.Out of 2,398 stocks traded so far, 1,442 have declined, 890 have advanced and 66 are unchanged.