Gold moved up slightly Monday and Tuesday, backslid Wednesday, then added $2.50 Thursday to reach $1,637.30 per troy ounce. Silver added 7 cents to close at $30.08 an ounce.
The euro fell to $1.315 from Wednesday's $1.3152, while the dollar rose to 80.26 yen from Wednesday's 80.17 yen.
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