The BSE benchmark Sensex rose by 65 points in the opening trade today, extending two-session winning streak on sustained buying by funds and retail investors, driven by a firming trend on the other Asian bourses.The 30-share index of the Bombay Stock Exchange, which had gained almost 450 points in the past two sessions, rose by another 64.80 points, to 19,757 with stocks of oil and gas, metals and PSU sector stocks leading the gains.In a similar fashion, the broad-based National Stock Exchange Nifty index moved 21.70 points up to 5,929. Meanwhile, the Hong Kong's Hang Seng index was up 0.27 per cent while, the Japan's Nikkei gained 0.05 per cent in the morning trade today.The US Dow Jones Industrial Average ended 0.16 per cent up in the previous session.