The Sensex is now down 206 points at 19,518.Bharti Airtel has tumbled over 6% to Rs 884.Reliance Energy has slumped over 4% to Rs 1,693. Wipro, HDFC, Ranbaxy and Hindalco have plunged nearly 3% each to Rs 485, Rs 2,622, Rs 424 and Rs 183, respectively.ACC and ICICI Bank have dropped 2.5% each to Rs 1,026 and Rs 1,268, respectively.Reliance Communications and Larsen & Toubro are down 2% each at Rs 774 and Rs 4,340, respectively.ITC has surged over 2% to Rs 176. SBI has advanced 1.6% to Rs 2,104, and Maruti has added 1% to Rs 3,700.Out of 2,644 stocks traded so far, 1,572 have declined, 1,014 have advanced and 58 are unchanged.