After yesterday's over 300 point rally, the Sensex at the Bombay Stock Exchange declined 127 points, or 0.7 per cent, to close at 17,750, on profit-booking, and weak Asian markets, today. The Nifty at the National Stock Exchange fell 37 points, or 0.7 percent, to 5,317.The bourses in Japan, Singapore, South Korea and Hong Kong lost between 0.5 percent and 1 percent, on renewed concern over Europe's economic crisis, after Fitch Ratings cut its debt rating on French bank, BNP Paribas.