Mumbai: The BSE barometer Sensex on Wednesday jumped by 422 points to close at a one-month high as investors cheered better quarter earnings by IT bellwether Infosys amid a firming global trend.
The 30-share index spurted by 421.92, or 2.55 percent, to 16,958.39 points, the highest closing since September 9.    

The broad-based National Stock Exchange index Nifty also rose by 125.05 or 2.51 percent to 5,099.40, after crossing a crucial 5,100 mark level in the intra-day trading.
A better closing in the Asian region and firming trend in Europe further bolstered the trading sentiment, even as the domestic industrial output rose less than expected.
Infosys, the second heaviest on the Sensex, rallied 6.83 per cent to Rs 2,680.50, its highest level since first week of August, while the most heaviest refinery major Reliance Industries spurted by 2.86 percent to Rs 849.50.
The largest software exporter Tata Consultancy Services jumped up by 3.66 percent to Rs 1,079.35 and Wipro by 2.71 percent to Rs 350.70 on expectations an improvement in the global market would boost their business.
Among the 30 index stocks, 27 scrips closed with gains. All the 13 sectoral indices led by IT, Teck, Bank and Realty closed significantly higher.
State-run lender State Bank shot up by 6.07 per cent to Rs 1,872.25. ICICI Bank, the second-biggest lender, gained 3.24 percent to Rs 859.95, while HDFC Bank rose by 2.08 percent to Rs 467.15 on interested buying.