Index heavyweight Reliance Industries (RIL) rose by 1.37 pct after the company issued a media statement following directions from the Delhi Government ordering filing of an FIR in relation to an earlier decision to hike gas price.
The sensex resumed higher at 20,449.83 and hovered in a a range of 20,506.51 and 20,429.83 before quoting at 20,498.34 at 1030hrs, showing a rise of 134.97 points of 0.66 per cent from its last close.
The NSE 50-share Nifty also rose by 37.70 points or 0.62 per cent to 6,100.40 at 1030hrs.
Other gainers were Gail India 2.66 pct, ICICI Bank 1.93 pct, Tata Motor 1.76 pct, Sun Pharma 1.43 pct, BHEL 1.36 pct, Larsen 1.24 pct, ONGC 1.05 pct and Bajaj Auto 0.97 pct.
Asian shares rallied for a fourth straight session in their early trade following upbeat trade data from China and an optimistic economic outlook from Federal Reserve Chief Janet Yellen. Key indices in China, Japan, South Korea, Singapore, Hong Kong and Taiwan rose 0.06 pct to 1.09 pct.