Gold edged up on Thursday, but uncertainty around US budget talks kept investors nervous and Asia's physical buying interest failed to lift prices substantially from a more than three-month low struck earlier this week. Spot gold inched up 0.2 percent to $1,669.31 an ounce by 0708 GMT, hovering above a key support at the 200-day moving average of $1,660.83. US gold rose 0.2 percent to $1,670.60.

Copyright Reuters, 2012