The BSE benchmark Sensex today rosefurther over 65 points in early trade on sustained buying by funds and retailers amid a firm trend in Asian regions.The 30-share barometer, which had gained 38.37 points in the previous session, rose further by 65.66 points, or 0.35 per cent, to 18,779. , led by oil and gas, realty and power sectors stocks.Similarly, the wide-based National Stock Exchange index Nifty moved up by 17.50 points, or 0.31 per cent, to 5,704.75.