Falling for the third consecutive day, the Sensex at the Bombay Stock Exchange lost 15 points to 20,879 in early trade today. The fall was attributed to sustained selling by funds, amid a weak trend in other Asian markets. The 30-share barometer had lost nearly 345 points in the previous two sessions.The Nifty at the National Stock Exchange declined by a point to 6,214.In the Asian region, Hong Kong's Hang Seng index traded lower by 0.58 per cent and Japan's Nikkei Index fell 0.50 per cent in early trade.The US Dow Jones Industrial Average ended 0.82 per cent higher in yesterday's trade.