London-listed miners popped Thursday with the coppor market in turmoil, as investors digested better economic news from China.

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 Trump's threatened 50% copper tariffs have boosted prices for the metal in the U.S. far ahead of anywhere else, lifting the premium to roughly one quarter. Copper futures mainly trad

While the cost of copper is going up for American businesses and consumers, the rest of the world is scratching its head while it enjoys a considerable discount on the price of copper.

Copper prices in the United States jumped more than 12% to a record high above $12,330 per metric ton after U.S. President Donald Trump said he would announce a 50% tariff on imports of the metal on Tuesday.

Fears of an upcoming 50% copper tariff have caused a spike in copper prices in the US, though the red metal’s price is falling elsewhere

Copper retreated from record highs on Wednesday as industry watchers grappled with what a 50% tariff rate on imports would do to the market.

Taking the average differential between the LME and Comex prices since February, when US copper imports picked up, and subtracting an estimated total cost of $500 per tonne, yields a profit of about $520 per tonne, according to FT calculations and information from market participants.