By Claudia Assis
SAN FRANCISCO (MarketWatch) -- Gold turned higher after concerns about the rising cost of Spanish debt roiled markets Monday. The metal recently wavered between small gains and losses, with the August contract GCQ2 +0.01% up 70 cents, or less than 0.1%, to $1,628.70 an ounce on the Comex division of the New York Mercantile Exchange. Yields on Spain's 10-year bonds shot past 7% on Monday.
