Copper Prices Rise on Supply Concerns but Dollar Weighs

Copper prices rose slightly on Friday, recovering some losses from earlier in the week, as supply concerns continued to weigh on the market. The metal's output in Chile, the world's largest miner of copper, declined by 12.8% year-on-year in August due to aging infrastructure and difficult operating conditions.

The Escondida copper mine in Chile, the world's largest, saw its supervisors reject a collective contract offer, potentially leading to a strike that would exacerbate supply fears.

However, the gains made by copper were not enough to offset the metal's worst weekly fall since April, largely due to the US dollar hitting a 17-month high. A stronger dollar makes commodities like copper more expensive for buyers using other currencies.