* Gold edges lower after four days of gains * Dollar rises after four-day slide * European shares extend gains (Updates throughout, changes dateline from SINGAPORE) By Clara Denina LONDON, July 12 (Reuters) - Gold eased on Friday, as the dollar rebounded and investors booked profits after four days of gains, putting it on track for its biggest weekly gain in nearly two years on easing fears of an early end to the U.S. Federal Reserve's monetary stimulus. Bullion had taken a beating after Fed Chairman Ben Bernanke said in...
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