Copper Prices Hit Record High as Tariff Uncertainty Drains Global Supply
TREE NEWS reports: Copper prices have surged to unprecedented levels, with LME copper breaking above $14,700 per tonne this week. However, this rally is not driven by a demand boom but by a severe regional imbalance in global copper inventories. The unresolved US tariff review on refined copper has kept a lucrative arbitrage window open between New York and London, pulling over one million tonnes of copper into the United States and tightening available supply elsewhere.
What Happened: The Tariff ‘Void’ and the Copper Squeeze
The US Department of Commerce had earlier proposed a 15% tariff on refined copper starting in 2027, rising to 30% by 2028. However, the Trump administration exempted refined copper last year, applying 50% tariffs only on semi-finished products like copper tubes and wires, while ordering a review by end of June. That deadline has passed with no announcement from the White House, leaving traders to continue rushing copper to US shores.
This ‘siphoning’ effect is starkly visible in LME inventories, which have plunged 32% in a month to just 205,000 tonnes. Meanwhile, Comex inventories have grown eight-fold since early last year to over 750,000 short tons (about 680,000 metric tonnes), and including off-exchange stocks, the US is estimated to be hoarding over one million tonnes—roughly the annual output of the world’s largest copper mine, Escondida.
Market Impact: A Structural Repricing Driven by Inventory Imbalance
The rally in copper is now a story of policy uncertainty and inventory hoarding rather than macroeconomic demand. The arbitrage premium between New York and London remains wide enough to incentivize traders like Mercuria and Trafigura to keep shipping copper to the US. Even if tariffs are ultimately not imposed, analysts expect much of this metal to remain locked in US warehouses for an extended period. If tariffs are imposed, a final rush of shipments could occur; if abandoned, traders might unwind positions built over the past 18 months, reversing trade flows.
Adding to the squeeze, the US government’s ‘Project Vault’—a $12 billion public-private initiative to build strategic reserves of critical minerals—includes copper as one of 60 designated critical minerals. This policy backing reinforces the expectation that copper flowing to the US will not easily return to global markets.
Demand and Supply: China’s Imports and Mine Constraints
On the demand side, China, the world’s largest copper consumer, has increased direct imports of refined copper this year as smelters face shortages of concentrate and scrap. With manufacturing entering its traditional peak season, Chinese demand is expected to rise further.
Supply constraints are more rigid: mine disruptions from Chile to Indonesia could push global mine output to its first annual decline since 2017, unless second-half production recovers. Declining ore grades make extraction costlier and harder, while environmental reviews raise costs for new projects. S&P Global data shows it takes an average of over 15 years from discovery to production for a mine.
Key Takeaways for Investors
- Copper’s rally is now structurally driven by regional inventory imbalances and policy uncertainty, not just global growth expectations.
- The unresolved US tariff review keeps the arbitrage window open, sustaining the drain of copper into the US.
- LME stocks are critically low, with cash-to-three-month spreads hitting their highest since the 2021 squeeze, indicating tight near-term supply.
- Long-term fundamentals—energy transition and AI data centers—remain supportive, but any resolution of the tariff review could trigger sharp reversals in trade flows and prices.
Investors should monitor US policy announcements closely, as a decision either way could dramatically alter copper’s trajectory. For now, the structural bull case remains intact, but the market is vulnerable to policy-driven volatility.
