The Sensex is now down 144 points at 20,683.Bharti Airtel has slumped 5.4% to Rs 914. Mahindra & Mahindra has tumbled 3.5% to Rs 748.Wipro has plunged 3.6% to Rs 468. Infosys, TCS and Satyam have slipped around 2.5% each to Rs 1,537, Rs 964 and Rs 401, respectively.ACC and ICICI Bank have dropped around 3% each to Rs 869 and Rs 1,397, respectively. HDFC has shed 2.4% at Rs 2,987.Hindustan Unilever has declined 2.3% to Rs 219. Maruti is down over 2% to Rs 880.Bajaj Auto and Ambuja Cements have shed 1.8% each at Rs 2,473 and Rs 137, respectively.HDFC Bank has rallied 2.8% to Rs 1,812.Reliance has surged 2.4% to Rs 3,202. Ranbaxy has gained 1.5% to Rs 401.BHEL and Reliance Communications have moved up 1.3% each to Rs 2,466 and Rs 803, respectively.SBI and DLF are up 1% each at Rs 2,460 and Rs 1,208, respectively.Out of 2,845 stocks traded so far, 1,487 have advanced, 1,330 have declined and 28 are unchanged.