Similarly, the broader National Stock Exchange Nifty rose by 33.20 points at 2,804.55 in opening trade.

Marketmen said overnight gains on the US markets and firming trend in other Asian stock markets, triggered buying on the domestic bourses.

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Encouraging third quarter earnings announced by some blue-chip companies also boosted investors.

They said a rise of up to three per cent in Indian companies ADRs on the US markets also influenced the trading sentiments.

Major gainers which supported the Sensex were Reliance Industries by 1.25 per cent to Rs 1,250, State Bank of India by 0.66 per cent to Rs 1,095.75, ICICI Bank by 1.74 per cent at Rs 388, Infosys Technologies by 0.43 per cent to Rs 1,258, Tata consultancy by 1.25 per cent to Rs 1,242, Larsen and Toubro by 0.63 per cent to Rs 642.20, BHEL by 0.82 per cent to Rs 1392.

However, Tata Steel stocks were under pressure ahead of quarterly results and traded 1.33 per cent down at Rs 170.