LONDON (Dow Jones)--The World Trust Fund (WTR.LN), announced Wednesday it purchased 543,000 ordinary shares of $0.20 each, to be held in treasury, at a price of 164.25 pence per share. MAIN FACTS: -Shares closed Wednesday at 165.25 pence -By Zechariah Hemans, Dow Jones Newswires; 44-20-7842-9411; [email protected] (END) Dow Jones Newswires July 21, 2010 12:08 ET (16:08 GMT)