The Bombay Stock Exchange slipped by 69.67 points at 17,475 in the afternoon trade today, on profit booking by localoperators amid weak global cues.Similarly, the wide-based National Stock Exchange index Nifty declined by 32.55 points, to 5,282.Erasing yesterday's gain of 50 points, the sensex was seen weak following selling in Auto, Realty, Power, Capital Goods, Metal and IT stocks.