Trump's Tariff Turbocharges Copper Market to Record Highs

The copper market has reached record highs due to a combination of factors, but the most significant contributor is not what you might expect. While concerns about weak manufacturing activity and declining ore grades have weighed on prices in the past, the current surge can be attributed to the Trump administration's trade policy.

Under Section 232 of the Trade Expansion Act, the White House opened a national-security investigation into copper imports, arguing that dependence on imported copper weakened the American industrial and defense base. As a result, a 50% tariff was imposed on covered semi-finished copper products and copper-intensive derivatives from August 1, 2025.

However, refined copper cathodes were initially spared, and it is this exemption that has led to a rush of imports into the United States. Traders are buying and importing copper before a possible 15% import tariff takes effect in January 2027, making the current trade speculative.

The U.S. Commerce Department recommended a universal tariff of 15% on refined copper from January 1, 2027, rising to 30% in 2028. The White House proclamation required a further review before the president decided whether to proceed. As a result, inventories available through the London Metal Exchange have shrunk, while COMEX inventories climbed for 46 consecutive trading days and reached a record of approximately 675,000 tonnes in August.

The United States imported about 885,000 tonnes of refined copper during the first half of 2026, more than double the corresponding quantity in 2024. Some of this metal will be used by American manufacturers, but analysts estimate that parts of the stockpile could take years to consume. The movement becomes harder to reverse after arrival, as shipping it out again creates additional transport, financing, and administrative costs.

The global copper market tells a darker story. Mines are producing insufficient concentrate for the world's rapidly expanded smelting capacity. Chinese smelters have competed so aggressively for concentrate that treatment and refining charges have collapsed. The annual benchmark processing fee fell to zero in 2026, while some spot charges have become negative.