The copper market is experiencing unprecedented fragmentation as uncertainty surrounding potential U.S. tariffs has created a significant price divergence between the Chicago Mercantile Exchange and the London Metal Exchange, according to a Sprott Radio podcast published Monday, September 14, 2026. Albert Mackenzie, Copper Analyst and Market Reporter at Benchmark Mineral Intelligence, explained that the CME is trading at approximately 500 to 600 dollars per ton above the LME, a premium driven entirely by tariff speculation. This arbitrage has created a powerful incentive for copper flows into American warehouses, despite global production-demand fundamentals showing a substantial surplus as recently as last year.
The tariff-driven dynamics have fundamentally altered copper's market structure. Typically, the LME price reflects duty-free international trading, while the CME incorporates the risk of U.S. customs and potential tariff barriers. U.S. copper imports more than doubled last year as traders positioned for potential tariff implementation, according to Mackenzie.
The analyst noted that current U.S. warehouse stockpiles now exceed the annual copper consumption of any single country outside China and the United States, creating an anomalous supply tightness in the rest of the world despite adequate global production. Copper prices have reached approximately 14,000 dollars per ton, up close to 50 percent from prices seen a year or two prior. The LME averaged 10,000 dollars per ton across 2025, the first year this benchmark was achieved, with an all-time high of 11,000 dollars per ton last year.
Mackenzie attributed the explosive rally partly to tariff uncertainty but also to a narrative-driven market focused on long-term supply concerns related to AI and energy transition demand, rather than traditional macroeconomic indicators. The analyst warned that the resolution of tariff policy could create significant volatility. If the Trump administration signals tariff implementation with adequate lead time, a rush of copper imports could further spike prices.
Conversely, if tariffs are imposed immediately or if policy clarity removes the tariff threat entirely, demand for U.S. warehouse stockpiling would evaporate, potentially triggering price corrections as the market rebalances. Beyond tariffs, Mackenzie highlighted structural constraints on copper supply. Major new copper discoveries remain scarce, with the industry typically benchmarking requirements against Escondida, the world's largest mine.
While projects in Argentina and potential reopenings like Cobre Panamá offer supply additions, new mine development in Western jurisdictions typically requires 10 to 20 years from discovery to production. China and Chinese-led investment accounted for approximately 70 percent of net new copper production over the past decade, Mackenzie noted, reflecting the faster deployment capability of state-directed capital compared to Western publicly listed mining companies. Recycling, while growing annually, cannot close the supply gap.
Mackenzie explained that recycling scrap mirrors demand cycles rather than offsetting them. When old buildings are demolished for new construction, the recycled copper from demolished structures is offset by the higher copper content required in new construction. Recycling also represents a delayed supply source, with a 20 to 30 year lag between initial copper use and scrap availability.
Mergers and acquisitions activity in copper mining has intensified as a faster route to production than building new mines. BHP acquired Australian miner OZ Minerals, Rio Tinto consolidated its partnership in the Oyu Tolgoi mine, and merger discussions involving Anglo American and Teck have reshaped the industry landscape. These transactions reflect the strategic value of acquiring existing production capacity given the extended timelines and regulatory obstacles to greenfield development.
The analyst cautioned that extreme copper price levels carry unintended consequences. At prices approaching 30,000 dollars per ton, theft becomes economically rational, as seen with catalytic converter theft from vehicles. South Africa's railway administration has already eliminated copper from infrastructure projects due to theft losses, and South Africa temporarily banned copper scrap exports to suppress the illicit recycled copper market.
According to Mackenzie, copper's role as an industrial metal facing energy transition demand represents a genuine long-term supply story, but current pricing reflects equity-market valuation methodology applied to commodities. The market is pricing copper based on anticipated demand 15 to 20 years forward, rather than traditional commodity pricing based on quarterly and annual fundamentals. Benchmark Mineral Intelligence publishes weekly analysis through the Benchmark Copper Weekly podcast and a free newsletter available on their website, with analysts actively sharing market updates on LinkedIn.
The firm specializes in energy transition commodity analysis, covering lithium, nickel, cobalt, and copper markets.
Source: sprott.com