The 30-share BSE Sensex fell 474.96 points or 0.82 per cent to 57,514.94 as 28 of its constituents traded in the red in early session. The broader Nifty of the National Stock Exchange dropped by 139.10 points or 0.81 per cent to below the 17,000-level at 16,960.95. As many as 45 of its stocks declined led by Adani Enterprises, JSW Steel and Hindalco.