The BSE benchmark Sensex fell by nearly 65 points to 17,426 during noon amid a weak trend in Asia. The 30-share index shed nearly 80 points in the early trade.Similarly, the wide-based National Stock Exchange index Nifty declined by 14 points, to 5,274.Meanwhile, in Asia, Japan's Nikkei Index fell by 0.74 per cent, while Hong Kong market shed 0.66 per cent.The US dow Jones Industrial Average ended almost flat in yesterday's trade.