Copper markets were thrown into fresh turmoil this week after US President Donald Trump announced plans to impose a 50% tariff on copper imports.
Contracts on the New York Comex surged to an unprecedented 25% premium over prices on the London Metal Exchange (LME) following the unexpected pledge.
The proposed tariff exceeds earlier market expectations of a 25% levy and comes as part of a broader push by the administration to ramp up domestic mining and smelting capacity.
Citigroup analysts described the measure as a “watershed moment” for the US copper market, warning that the policy could close the window for large shipments into the United States and reshape trade flows for the commodity in the months ahead.
Since February, when the White House first signalled its intention to review copper imports under Section 232 of the Trade Expansion Act, traders have rushed to ship record volumes of the metal to US ports, hoping to beat any impending duties.
Commerce Secretary Howard Lutnick confirmed that the tariff is likely to come into effect by late July or early August, although specific details — including the scope of products affected and possible exemptions for major producers like Chile — remain under discussion.
The tariff announcement comes at a time when copper demand is projected to expand significantly due to its vital role in renewable energy, electric vehicles and digital infrastructure.
Analysts at Jefferies LLC noted that the US remains heavily reliant on foreign sources for refined copper, with net imports covering approximately 36% of total demand.
“The US does not have nearly enough mine, smelter or refinery capacity to be self-sufficient in copper,” Jefferies analysts wrote in a client note. “The higher tariff is likely to keep US domestic prices at a premium relative to global markets for an extended period.”
Spot copper contracts on the LME fell after the White House announcement, underscoring the likelihood that more metal may now stay in Europe and Asia if the US trade window closes sooner than anticipated.
On Tuesday, copper futures in New York jumped as much as 17% to hit an all-time high before easing slightly on Wednesday.
LME copper, meanwhile, slipped by as much as 2.4% in early trading before recovering some losses to trade around $9,621 per ton by mid-afternoon local time.
Industry strategists warn that while the tariff aims to protect domestic producers, it could raise input costs for manufacturers across sectors ranging from construction to electronics and electric vehicles, potentially offsetting any intended benefits of boosting local output.
Macquarie’s head of commodities strategy, Marcus Garvey, noted that the final impact will depend heavily on whether the tariff includes any carve-outs or grace periods for copper already in transit.
“The degree of impact will heavily depend on the details — not only the tariff rate but which forms of copper it applies to and whether there is any grace period,” Garvey said.
As the global copper market absorbs this new twist in US trade policy, traders and buyers are bracing for continued volatility, with the potential for abrupt shifts in trade flows, regional premiums and price arbitrage in the coming weeks.
