The BSE benchmark Sensex fell by 83 points in opening trade today. The 30-share BSE Sensex, which has lost over 450 pointsin the past three sessions, fell further by 83 points, or0.49 per cent, to 17,035.74 in the first few minutes of trade . In a similar fashion, the wide-based National StockExchange Nifty index declined by 22.90 points, or 0.44 percent, to 5,125.45.