Chile, the biggest copper-producing country, trimmed its annual price forecast for the metal on slowing Chinese demand and prospects of an easing in U.S. stimulus. The Chilean government’s copper commission, Cochilco, expects prices to average $4.20 a pound this year, according to a presentation Tuesday, down from a $4.30 call made three months ago. Prices are expected to average $3.95 next year as the market swings into surplus, Cochilco said. Since surging to record levels in May as producers struggled to meet demand in a global recovery, copper prices have retreated and then bounced around in a fairly tight range. ... (full story)