The Sensex opened 10 points higher at 8,536, and dropped to a low of 8,476 in noon deals. After moving in a narrow range for most part of the session, the index zoomed to a high of 8,614 - a bounce of 138 points from the intra-day low. The Sensex finally closed with a gain of 80 points (.94%) at 8,606.ONGC moved up 2.8% (Rs 29) to Rs 1,070. Reliance added 1.6% (Rs 13) to Rs 800, and SBI was up Rs 8 at Rs 936. HLL gained 2% (Rs 4) to Rs 184. NTPC added 3% (Rs 3) to Rs 109. BHEL gained 2.6% (Rs 30) to Rs 1,164. Tata Power was up 2.7% (Rs 12) at Rs 464. L&T was up 2% (Rs 33) at Rs 1,473. Hero Honda gained 2% (Rs 14) to Rs 726, and Maruti added Rs 5 to Rs 564.HDFC advanced 3.7% (Rs 37) to Rs 1,038. While HDFC Bank was up over 2% (Rs 15) at Rs 696, ICICI Bank was up Rs 11 at Rs 599.Dr. Reddy's was up Rs 3 at Rs 812. Cipla and Ranbaxy also moved up today.