Backed by buoyancy in global markets, the Sensex opened with a positive gap of 129 points at 17,902, and soon rallied to a fresh all-time intra-day high of 17,983 - just 17 points shy of the 18,000-mark. However, resistance at higher levels saw the index pare gains and slip into the negative zone. Aggressive profit-taking saw the Sensex tumble to a low of 17,322 - down 661 points from the peak. Selective buying, thereafter, helped the index recover partially towards the close.The Sensex finally ended with a loss of 282 points at 17,491.The BSE Metal, Realty and PSU indices plunged nearly 4% each to 13,590, 9283 and 8025, respectively. The Bankex dropped 2.6% to 8985.The market breadth was extremely negative - out of 2,783 stocks traded, 2,264 declined, 473 advanced and 46 were unchanged today.INDEX SHAKERS...Tata Steel, ACC and Ranbaxy tumbled around 5% each to Rs 789, Rs 1,115 and Rs 412, respectively.Reliance Energy, NTPC, Hindalco and SBI have plunged around 4.5% each to Rs 1,380, Rs 205, Rs 162 and Rs 1,783, respectively.Dr.Reddy's slipped 3.7% to Rs 629. Mahindra & Mahindra and Grasim shed 3.5% each to Rs 725 and Rs 3,420, respectively.Tata Motors, ONGC and Reliance dropped 2.7% each to Rs 758, Rs 940 and Rs 2,417, respectively.Larsen & Toubro and ICICI Bank declined around 2% each to Rs 3,020 and Rs 1,016, respectively. Ambuja Cements was down 1.5% at Rs 145....AND THE MOVERSSatyam gained 2.5% at Rs 456, and Wipro rallied nearly 2% to Rs 470.BHEL surged 1.7% to Rs 2,191.VALUE & VOLUME TOPPERSWelspun Gujarat topped the value chart with a turnover of Rs 356 crore followed by Reliance Energy (Rs 339 crore), Reliance (Rs 280 crore), Power Grid (Rs 275 crore) and IFCI (Rs 248 crore).IFCI led the volume chart with trades of around 3.12 crore followed by Power Grid (2.80 crore), Ispat Industries (2.75 crore), Reliance Natural (2.25 crore) and Tata Tele (1.82 crore).