U.S. copper prices are trading at records ahead of the 50% tariff that the president has promised to impose on imports.

U.S. President Donald Trump's threat of a 50% tariff on copper imports is raising alarm in the U.S. auto sector, as it could make it even harder for carmakers and suppliers to absorb border taxes and rising costs,

President Donald Trump announced on Wednesday night that the United States will impose a 50 percent tariff on copper, effective August 1. Trump wrote on Truth Social that he came to the decision after a "robust NATIONAL SECURITY ASSESSMENT."