The tariff trade, which has defined the copper market since February, has imploded. The CME's U.S. contract plummeted by more than 20% on the news, wiping out the previous high premium over the London Metal Exchange (LME) price.

U.S. copper prices plunged after President Trump unveiled 50% tariffs on copper products, but not on the raw material itself. Copper prices surged to records this month after Trump said he would impos

The United States will impose a 50% tariff on copper pipes and wiring, President Donald Trump said on Wednesday, but details of the levy fell short of the sweeping restrictions expected and left out copper input materials such as ores,

The president unveiled a 50% tariff on copper products, but not on the raw material itself.

US copper prices tumbled after Donald Trump exempted refined materials from the new 50 per cent tariffs on the metal. The White House said on Wednesday it would impose 50 per cent levies on semi-finished products,

Raw copper materials will not face the high duty that had been expected, but consumer goods prices may still be impacted.