The Bombay Stock Exchange benchmark Sensex today fell by over 80 points in early trade amid capital outflows by foreign funds on weak global cues.The 30-share Sensex, which had lost 18.52 points in yesterday's trade, moved down by 80.44 points, or 0.47 per cent to 16,813.81.The wide-based National Stock Exchange index Nifty also drifted by 30.40 points, or 0.60 per cent to 5,011.35.