Donald Trump's mooted 50% tariff on copper imports into America has sharply exacerbated what was already a dislocation between New York and London prices for the metal. The chart shows that since Trump's inauguration traders have been placing a greater premium on the COMEX contract,

Futures contracts hit a record price after the president announced plans for a 50 percent tariff on the metal, driving up costs for businesses.

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,

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.

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