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

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.

U.S. President Donald Trump's 50% tariff on copper has placed a record premium on prices of the metal in the United States that is likely to ease over the coming months as a stockpile created by traders anticipating the levy works through the system.

Copper futures (HG1:COM) extended their rally on Thursday, rising around 2% as traders reacted to U.S. President Donald Trump’s announcement of a 50% tariff on imported copper, set to take effect on August 1.

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