Copper Prices Reach Record Highs Amid Tariff Uncertainty and Supply Constraints

Copper prices have surged to record highs, with London Metal Exchange futures hitting $14,708 per tonne on September 8 and New York futures settling at $6.89 per pound. This rally follows a period of volatility and marks a significant increase over the past year, with prices rising 40 percent in the last 12 months. Analysts and industry insiders attribute the surge to a combination of geopolitical uncertainty, supply chain disruptions, and evolving technological demand.

A primary driver of the current price spike is the anticipation of new United States tariffs. While President Donald Trump previously imposed a 50 percent tariff on semi-finished copper imports, there is a proposal to implement a 15 percent tariff on refined copper starting in January, potentially increasing to 30 percent by 2028. This has led to a massive shift in inventories as traders front-load copper into the US COMEX warehouses to avoid future duties. This movement has drained stocks from the London and Shanghai exchanges, creating a shortage of tradable copper outside the US and generating arbitrage opportunities for traders.

Beyond tariffs, fundamental supply and demand issues are contributing to the price elevation. Global copper mine output declined by 1.1 percent in the first half of 2026, with Chile, the world's largest producer, seeing a 6.6 percent drop due to poor weather and deteriorating mine quality. Simultaneously, demand is being driven by the AI boom, electric vehicle manufacturing, and infrastructure for power grids and clean energy. These factors have led to higher costs for businesses, including an 18 percent year-over-year increase in the cost of copper wire and cable as of July.

While both reports agree on the facts of the price surge, they emphasize different catalysts. A center-leaning perspective focuses heavily on the geographical rebalancing of inventories and the specific mechanics of the LME and COMEX exchanges. A center-left perspective places more emphasis on the long-term supply-demand mismatch caused by the AI boom and the environmental factors affecting mine production.