The NSE Nifty is up 57 points at 3,918.
Ranbaxy has soared 7.5% to Rs 440. Reliance Infrastructure has surged 3.3% to Rs 793.
HDFC, Satyam and Jaiprakash Associates have rallied 3% each to Rs 1,857, Rs 411 and Rs 150, respectively.
BHEL has moved up 2.7% to Rs 1,409. Hindalco, Larsen & Toubro and Bharti Airtel have added 2.5% each to Rs 142, Rs 2,336 and Rs 727, respectively.
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Tata Steel and Reliance have gained 2% each at Rs 660 and Rs 2,015, respectively.
HDFC Bank and ICICI Bank have advanced 1.8% each to Rs 933 and Rs 538, respectively.
Tata Motors has slipped 2.6% to Rs 394. Grasim has shed 2% at Rs 1,665, and NTPC is down 1% at Rs 161.