The Bombay Stock Exchange benchmarkSensex lost over 167 points points in the opening trade today, on sustained selling by funds and retail investors amid weak trend on the other Asian bourses.The 30-share barometer, which has lost almost 740 points in the previous three sessions, fell by 167.79 points or 0.87 per cent to 19,074.57, with consumer durables, banking and realty sector stocks remaining under pressure.Similarly, the wide-based National Stock Exchange index Nifty declined by 45.35 points or 0.78 per cent to 5,721.15 points.