The BSE benchmark Sensex continued its slide for the fourth straight session and fell further by nearly 162 points in early trade today.It declined further to 15,804 points in opening trade due to sustained selling by foreign funds amid a weakening trend on other Asian bourses.The 30-share barometer has lost over 473 points in the previous three sessions.All sectoral indices, led by healthcare, auto and power stocks, fell up to 1.53 per cent.Similarly, the wide-based National Stock Exchange index Nifty declined by 50 points to 4,791.In the Asian region, the Japan's Nikkei fell by 2.16 per cent, while Hong Kong's Hang Seng shed 1.16 per cent in early trade. The US Dow Jones Industrial Average ended 2.22 per cent lower on Friday.