After opening with a positive gap of 23 points at 6,629, the Sensex surged to an early high of 6,645 on stock-specific gains.While the index slipped into the red in mid-morning trades, it soon bounced back into positive territory to display a range-bound (positive) trend till mid-noon trades.The markets witnessed a sharp turnaround in late noon trades as widespread selling pressure saw the Sensex plunge deep into the red to touch an intra-day low of 6,531.The Sensex, after displaying an intra-day movement of 114 points, closed with a loss of 61 points at 6,546. ONGC dropped 2.58% (Rs 24) to Rs 893. While Reliance dipped a per cent (Rs 5) to Rs 565, HLL closed down a tad at Rs 132. ITC, however, was up Rs 4 at Rs 1,374.Infosys slumped 2% (Rs 45) to Rs 2,187. While Wipro moved up 1.61% (Rs 11) to Rs 680, Satyam was up a rupee at Rs 423.ICICI Bank tumbled 3.57% (Rs 15) to Rs 409. While HDFC Bank gained 1.64% (Rs 9) to Rs 562, SBI was up Rs 3 at Rs 655.Cipla declined 2.64% (Rs 7) to Rs 253. While Ranbaxy lost a per cent (Rs 9) to Rs 986, Dr. Reddy's ended marginally higher at Rs 748.L&T declined 2% (Rs 22) to Rs 1,004, and BHEL lost 2.47% (Rs 20) to Rs 790.While Tisco dipped 1.18% (Rs 5) to Rs 386, Tata Power was down 1.39% (Rs 5) at Rs 347.Tata Motors advanced 2.79% (Rs 11) to Rs 424. Hero Honda clocked a per cent gain (Rs 6) to Rs 541, Maruti was up Rs 2 at Rs 410. Bajaj dropped 2.6% (Rs 28) to Rs 1,039.Grasim and Gujarat Ambuja ended with marginal losses at Rs 1,225 and Rs 408, respectively. ACC, however, was up a notch at Rs 364.Select bank stocks logged gains. IndusInd Bank was up 5% at Rs 57. Union Bank and Oriental Bank also moved up.The broad market finished on a positive note - out of 2,424 scrips traded, 1,247 advanced, 1,090 declined and 87 were unchanged today.Tata Teleservices topped the volume chart with trades in over 82 lakh shares followed by HOEC (nearly 71 lakh shares) and Ispat Industries (54 lakh shares).Reliance was the most active counter with a turnover of Rs 88 crore followed by IVRCL (Rs 82 crore) and Satyam (Rs 76 crore).