The BSE benchmark Sensex fell by nearly 89 points in early trade today as funds and retail investors preferred to book profits amid a weak trend in the Asian region. he 30-share index fell by 88.71 points, or 0.49 per cent, to 17,761.51. Similarly, the wide-based National Stock Exchange index Nifty declined by over 34 points, or 0.63 per cent, to nearly 5381.