US prices of copper have been on a tear this year due to the fear that tariffs will be imposed on imports of the red metal.

Tariffs imposed by US President Donald Trump on imports of steel and aluminium have taken effect in a move that will likely escalate ... halted a plan to double US tariffs on Canadian steel and metal ...

President Trump imposed a 25 percent tariff on metal imports, sparking new global ... tariffs on foreign steel and aluminum went into effect on Wednesday, inviting immediate retaliation from ...