The Bombay Stock Exchange benchmark Sensex opened sharply higher by 575 points in early trade on Wednesday on funds buying in heavy-weight stocks, led by realty and power sectors.
The 30-share index, which had lost 176.34 points on Tuesday, bounced back by 575.52 points to 13,925.17.
Similarly, the National Stock Exchange's index Nifty regained 4,100 level by gaining 133.80 points to 4,122.35.
Marketmen said easing political tension and firming global markets influenced the trading sentiments.
They said the Hong Kong market opened higher by over 558 points following overnight jump' on the US markets.
Major gainers, which supported the Sensex were Reliance Industries, Reliance Infra, Rcom, ONGC, Larsen and Toubro, BHEL, Grasim Industries, HDFC Bank, ICICI Bank, State Bank of India, Infosys Technologies, TCS and Maruti.