The S&P BSE Sensex today bounced back by 400 points in late morning trade today on fresh buying as Asian stocks jumped after US Federal Reserve Chairman Ben S Bernanke said the world's biggest economy will continue to need stimulus. *Stocks: Top Gainers/Top Losers * Stocks: Top Value Bernanke' comments helped ease concerns about global liquidity. The Fed's bond-buying programme,which has flooded global markets with liquidity,has helped support an array of assets,including equities in recent years. The Sensex is up more than 2 per cent after hitting its highest mark since June 7. The Nifty is up 2.12 per cent,after marking its highest intra-day level since June 10. Shares of metal,banking,capital goods,realty,PSU,power and refinery firmed up sharply on fresh demand. L&T was trading at Rs 978 as the stock turned ex-bonus today for 1:2 bonus issue. The benchmark BSE-30 share index,Sensex,opened higher at 19,468.46 points and advanced further to 19,664.62 before quoting 19,705.64 at 12.30 hours. It showed a sharp gain of more than 400 points cent from its last close. Major gainers were Hindalco Industries (3.52 per cent),Coal India (3.34 per cent),Larsen (2.99 per cent),HDFC bank (2.92 per cent),Sterlite Ind (2.81 per cent) and ICICI Bank (2.43 per cent). Asian stocks rose in early trade. Key benchmark indices in China,Hong Kong,Indonesia,Singapore,South Korea and Taiwan rose by 1.52 to 2.48 per cent while Japan's Nikkei Average fell 0.15 per cent.