Copper prices faced a downturn due to cautious trading leading up to the Federal Reserve's imminent interest rate decision. The easing of supply constraints in China added further downward pressure on both copper and zinc. Conversely, aluminium experienced an uptick as escalating conflicts in the Middle East raised supply concerns.

Producers of metals, grains and other raw materials rose as the U.S. dollar slipped against rivals ahead of the Federal Reserve's decision.

Copper prices faced a downturn due to cautious trading leading up to the Federal Reserve's imminent interest rate decision. The easing of supply constraints in China added further…