The BSE benchmark index Sensex rose by 137 points in early trade today to 19,566 as stocks of IT, capital goods and banking sectors recovered on fresh spell of buying, driven by a firming trend overseas.On similar lines, the National Stock Exchange index Nifty gained 40 points to trade at 5,921.In Asia, Hong Kong's Hang Seng index was up 0.50 per cent and Japan's Nikkei rose 3.82 per cent.The US Dow Jones Industrial Average ended 1.38 per cent lower in the previous session on Friday.