Bombay Stock Exchange benchmark Sensex shed over 74 points in opening trade today. It was dragged by continued selling by funds amid losses in other Asian bourses.The BSE 30-share barometer, which has lost over 600 points in the previous two sessions, declined to 19,017 levels today, with realty, auto, metals and oil and gas sector stocks leading the fall.Similarly, wide-based National Stock Exchange index Nifty lost 19.90 points to 5,709.20 points.Japan's Nikkei was down by 1.13 per cent, while Hong Kong's Hang Seng fell by 1.22 per cent in morning trade today.In the US, Dow Jones Industrial Average ended 1.14 per cent down in Monday's session.