The Sensex has tumbled into negative zone and is now down 25 points at 11,054.HDFC has rallied nearly 2% to Rs 1,343. Maruti has advanced 1.6%.Ranbaxy and Wipro have spurted 1.2% each to Rs 405 and Rs 526, respectively.Tata Motors and Hero Honda are up over 1% each at Rs 911 and Rs 898, respectively.Reliance Industries and Tata Steel have slipped 1% each to Rs 607 and Rs 513, respectively.The market breadth is nearly neutral. Out of 1,940 stocks traded so far, 969 have moved up, 904 have slipped and 67 are unchanged.Himachal Futuristic has zoomed 11% to Rs 25.70. State Bank of Mysore, Mahindra Gesco, Kalpatru Power, Thomas Cook, Provogue, Unitech, State Bank of Travancore, J K Industries, Piramyd Retail and Ramco Industries are the other major gainers.Sundaram Clayton has plunged 7% to Rs 902. Ind-Swift, Bajaj Auto Finance, Berger Paints, Nahar Spinning, Color Chem, Noida Toll, KLG Systel, Prism Cements, Deccan Chronicle, Goetze India, Ingersoll Rand and SAIL are the other prominent losers.