Gold prices were little changed on Friday and on track for their fourth-straight week of losses, after weak economic data from China and the euro zone sent bullion to a two-month low in the previous session. Spot gold was little changed at $1,645.15 an ounce by 0656 GMT, on course for its fourth consecutive week of losses, with a 0.5-percent decline. US gold edged up 0.2 percent to $1,645.20.