The Sensex is now down 42 points at 18,073.The NSE Nifty is down 22 points at 5,281.Satyam and Tata Motors have plunged 2.5% each to Rs 427 and Rs 732, respectively.TCS, BHEL and DLF have tumbled around 2% each to Rs 852, Rs 2,212 and Rs 862, respectively.ONGC, Wipro and SBI have shed 1.7% each at Rs 1,015, Rs 413 and Rs 2,260, respectively.Reliance has slipped 1.3% to Rs 2,557, and HDFC has declined 1% to Rs 2,892.Mahindra & Mahindra (M&M) has rallied 3.3% to Rs 639, and ITC has surged 3% to Rs 209.Hindustan Unilever has moved up 2.5% to Rs 217, and Hindalco has added 2.2% to Rs 183.ICICI Bank has advanced 1.4% to Rs 1,208. Bajaj Auto is up 1% at Rs 2,197.Out of 2,734 stocks traded so far, 1,801 have advanced, 874 have declined and 59 are unchanged.