On Friday, BSE Sensex fell 1,687 points or 2.87 per cent to close at 57,107.15, NSE Nifty declined 509.80 points or 2.91 per cent to close at 17,026.45. Friday’s performance implied that the benchmark indices have fallen in six sessions in the past eight days. This was also the worst single-day drop on the BSE in about seven months.