Infosys jumped over 13 per cent after the company retained its guidance of 6 to 10 per cent growth in revenue in dollar terms for the year ending March 31, 2014, after announcing Q1 June 2013 results before trading hours.
The 30 share index opened higher at 19,898.69 points and moved up further to 19,962.78, but declined afterwards to 19,785.59 before quoting 19,822.74 at 1025 hours.
The NSE 50-share barometer Nifty also rose by 26.35 points, or 0.44 per cent, to 5,961.45 at 1025 hours.
Other major gainers were - TCS (2.73 pct), Wipro (2.42 pct), Tata Motors (0.98 pct) and HDFC (0.74 pct).
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However, Maruti Suzuki dropped by 2.12 per cent, Cipla 1.33 pct, HDFC 1.17 pct, ITC 1.15 pct and Coal India 1.12 pct.
Foreign institutional investors (FIIs) bought shares worth a net Rs 638.26 crores, as per provisional data from the stock exchanges.
Most Asian stocks fell in their early trade. Key indices in China, Hong Kong, Singapore and South Korea fell by 0.38 to 0.6 per cent while indices in Indonesia and Japan rose by 0.1 to 0.13 per cent.