The Bombay Stock Exchange benchmark Sensex today fell point 3 per cent as investors sold shares to book profits, ending a three-day rally. The 30-share benchmark index, which gained over 355 points in the last three days, attracted profit selling and closed nearly 52 points lower to 16,998. The key-index moved between 17,098 and 16,958 points during the day.Similarly, the wide-based National Stock Exchange index Nifty moved between 5,079 and 5,041 before ending lower by 7.55 points at 5,054 point.Besides profit booking, mixed Asian cues and better European trend, kept the market volatile before ending with moderate losses.