Copper prices face volatility amid inflation and smelting margin collapse

Copper prices have experienced significant volatility, recently hitting record highs on the London Metal Exchange (LME) above $14,500 per metric ton before retreating. This pullback follows US inflation data showing headline inflation rose 0.4% month-over-month and 3.4% year-over-year, increasing market expectations for Federal Reserve interest rate hikes to approximately 85-88%.

Despite record prices, the copper market faces a paradox in the smelting sector. Global smelting margins have collapsed, with the 2026 benchmark treatment and refining charge falling to $0 per ton. In some instances, spot rates have turned negative, meaning smelters are paying miners to process ore. This squeeze is driven by a mismatch between massive smelting capacity—largely concentrated in China—and a shrinking pool of available concentrate.

Supply constraints are being exacerbated by production declines and disruptions globally. Chile has reported its weakest second-quarter output in 19 years, and major operations in the Congo and Indonesia have faced disruptions. Additionally, the Cobre Panama mine remains closed due to legal disputes. The International Energy Agency has identified copper as a critical mineral at high risk of supply shortfalls in the coming decade.