The Sensex opened with a positive gap of 25 points at 8,814, but dropped to a low of 8,769 in late morning deals.

Sustained buying across-the-board in noon deals saw the index zoom to a high of 8,960 - an intra-day swing of 191 points. The Sensex finally closed with a gain of 156 points (1.9%) at 8,945.

The Nifty has gained 47 points to 2,699.

Infosys [Get Quote] advanced 3% (Rs 83) to Rs 2,767. While Satyam [Get Quote] gained over 2% (Rs 15) to Rs 669, Wipro [Get Quote] was also up over 2% (Rs 10) at Rs 432. TCS [Get Quote] was up 2% (Rs 30) at Rs 1,549.

SBI [Get Quote] was up 1.9% (Rs 17) at Rs 914. ONGC [Get Quote] gained Rs 13 to Rs 1,043. While Reliance moved up Rs 7 to Rs 840, HLL [Get Quote] was up Rs 3 at Rs 185.

ACC zoomed 5% (Rs 25) to Rs 534. Grasim [Get Quote] gained 2.6% (Rs 36) to Rs 1,405. Gujarat Ambuja [Get Quote] was up over 2% at Rs 83.

Cipla jumped over 4% (Rs 17) to Rs 415. Ranbaxy [Get Quote] advanced over 3% (Rs 12) to Rs 397. Dr. Reddy's added Rs 15 to Rs 929.

Tata Motors [Get Quote] added over 3% (Rs 17) to Rs 573.  Maruti [Get Quote] was up Rs 8 at Rs 621.

Reliance Energy [Get Quote] gained 5.6% (Rs 33) to Rs 620. L&T zoomed 4% (Rs 74) to Rs 1,767.  BHEL was up Rs 29 at Rs 1,455. HDFC [Get Quote], HDFC Bank, ICICI Bank [Get Quote] and Hindalco [Get Quote] also finished with gains.