The Sensex opened on a bullish note with a positive gap of 24 points at 6,405, which also turned out to be the low for the day. Sustained buying was seen right through the day, especially in tech scrips and heavyweights like ITC. The index zoomed to a high of 6,509 before ending the day with a gain of 111 points (1.75%) at 6,493.Tech scrips rallied sharply today. Wipro zoomed over 6% (Rs 41) to Rs 671. Infosys advanced 4% (Rs 83) to Rs 2,253. Satyam added 3% (Rs 12) to Rs 408.Heavyweights, too, finished on a bullish note. ITC rallied 5% (Rs 63) to Rs 1,344. ONGC moved up 3% (Rs 24) to Rs 883. Reliance was up Rs 3 at Rs 546. SBI, however, declined Rs 4 to Rs 657.Bajaj jumped nearly 5% (Rs 48) to Rs 1,081. Hero Honda was up 3% (Rs 16) at Rs 561. Maruti and Tata Motors also closed with gains.Gujarat Ambuja added 3% (Rs 13) to Rs 410. ACC and Grasim also moved up today. ICICI Bank was up 2.7% (Rs 10) at Rs 393. HDFC Bank moved up 2% (Rs 11) to Rs 543. BHEL was up 3% (Rs 24) at Rs 775. Bharti, Tisco, L&T and Zee also closed higher today.Ranbaxy declined 2% (Rs 20) to Rs 1,004. Reliance Energy was also down 2% (Rs 10) at Rs 530. HDFC was down Rs 10 at Rs 725.