Copper Hits Record High as Tariffs and AI Demand Skew Economic Signals

Copper prices surged to a new record on Thursday, but the rally is not signaling a broad acceleration in global economic activity. The industrial metal, long known as “Dr. Copper” for its purported ability to diagnose the health of the world economy, is now being driven by a complex mix of supply constraints, anticipated U.S. tariffs, and a structural shift in demand, according to market analysts.

On Thursday, COMEX copper futures briefly surpassed $6.90 per pound, while the three-month contract on the London Metal Exchange (LME) reached $14,369.50 per ton. The metal has gained approximately 19% year-to-date, but the factors behind its ascent are diverging sharply from historical precedent.

Supply Constraints Create 'Perfect Storm'

A primary driver of the price surge is a structural tightening on the supply side. Michael Widmer, head of metals research at Bank of America, noted that this rally is “not driven by copper demand, but by copper supply,” citing weak mine supply growth and frequent disruptions.

Key supply issues include:

• Chilean Production Woes: The world's largest copper producer, Chile's state-owned Codelco, has consistently failed to meet production targets for the past seven years. Its 2026 production guidance of 1.33 to 1.36 million tons represents a structural deficit of over 300,000 tons from previous goals. Severe winter storms have also recently halted operations for major miners like Codelco and BHP in northern Chile.
• DRC Export Ban: The Democratic Republic of Congo, the world's second-largest copper producer, announced a ban on the export of copper and cobalt concentrates to encourage domestic processing. This move signals a new phase of resource nationalism, where producing countries seek greater control over pricing.
• Tight Raw Materials: The extreme scarcity of upstream supply is reflected in copper concentrate treatment and refining charges (TC/RCs), which have fallen to a historic low of -$160.67 per ton.

US Tariff Bets Trigger Hoarding

Anticipation of future U.S. tariffs is another critical factor distorting the market. With the market widely expecting the U.S. to impose a 15% tariff on refined copper in 2027, rising to 30% in 2028, a massive wave of stockpiling is underway.

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Over 200,000 tons of copper arrived at U.S. ports in July, the largest single-month inflow in over a decade. As a result, COMEX copper inventories have swelled to 720,000 tons, with total U.S. stockpiles estimated to exceed 1 million tons. “Tariff arbitrage is overwhelming demand growth,” a metals director at StoneX Financial was quoted as saying. This has created a significant price gap between U.S. and international markets, with the COMEX-LME spread widening to around $500 per ton and draining inventories on the LME to below 250,000 tons.

Demand Shifts to AI and Grid Upgrades

The nature of copper demand is also undergoing a fundamental change. Instead of being driven by broad-based economic activity in sectors like construction and consumer appliances, demand is now increasingly concentrated in specific high-growth areas.

William Osnato, director of commodity data research at Barchart, stated that the “core support story is data center and grid demand to support the rapid expansion of the AI industry.” This demand is “more concentrated and not the traditional broad economic growth that supports copper prices.” Supporting this trend, China recently announced a grid upgrade investment plan worth approximately $574 billion.

Why 'Dr. Copper' Is Ailing

The traditional logic behind using copper as an economic bellwether is breaking down. The current price action is primarily dictated by supply constraints, speculative tariff-related inventory moves, and concentrated demand from policy-driven sectors like grid modernization and the AI boom.

This shift means copper prices are becoming less sensitive to the business cycle and more influenced by structural and geopolitical factors. “This is definitely a new situation for ‘Dr. Copper’,” Osnato concluded. As the metal’s price signals become more complex, investors and policymakers may need to re-evaluate its reliability as a simple gauge of global economic health.