The Sensex at the Bombay Stock Exchange rose 122 points in early trade today on sustained buying on optimism of RBI easing monetary policy next month, amid a firming global trend. Extending gains for the second straight day, the 30-share barometer today rose by 0.63 per cent, to 19,487.The Nifty at the National Stock Exchange traded above the crucial 5,900 level by gaining 34 points, or 0.58 per cent, to 5,931.In the Asian region, Hong Kong's Hang Seng rose by 0.71 per cent, while the Japan's Nikkei by 1.01 per cent in early trade today.The US Dow Jones Industrial Average ended 0.87 per cent higher yesterday.