Copper's benchmark contract in London briefly set a fresh all-time high at $14,533 a ton, then gave back part of the move. The push came on a quiet Monday with US exchanges shut for Labor Day, which dulled risk appetite across markets. Despite that, copper has ripped higher this year, rising 17% since January and 47% over 12 months, as a years-long shortage narrative keeps meeting real-world constraints at older, large mines.
Macro headwinds have not stopped it. Investors have been climbing the wall of worry that includes the war in Iran and rising US borrowing costs that strain capital-heavy manufacturers. High prices can curb consumption as buyers seek workarounds, but so far that has not capped copper's upswing.
Short-term forces are doing a lot of the lifting. A persistent premium for New York's Comex futures opened a big arbitrage after President Donald Trump first floated copper tariffs in February last year.
The result: stockpiles look ample in aggregate, but they are piled up in the US while inventories in the LME's global warehouse network have thinned. That shift has choked near-term availability elsewhere, squeezed traders who were short and helped propel prices to a record in what is otherwise a lukewarm demand environment. Cristián Cifuentes of Cesco - a Chilean copper industry think tank where he serves as senior analyst - said, "This is driven more by the relocation of metal due to tariffs than by excess final demand."
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The import wave and drained inventories culminated in an acute LME squeeze last month after exchange stocks slid to critically low levels. Some new deliveries have since eased the tension, but spot prices on the LME remain at a hefty premium to three-month futures - classic backwardation that flags tight nearby supply. Comex inventories, meanwhile, are unusually elevated compared with the London and Shanghai exchanges.
Miners have been clear beneficiaries. Rio Tinto Group, BHP Group, Glencore Plc and Zijin Mining Group Co. all reported sizable profit gains in their latest results, helped by their copper businesses. Still, operations have not been smooth across the industry this year.
Figures released Monday indicated that August copper export revenue for top producer Chile slipped to its lowest level in more than a year. Without a rebound in the second half, global mined output is on track for its first annual drop since 2017. Michael Cuoco, StoneX's head of metals, said the combination of brisk demand growth and ongoing supply constraints "should bring about a tighter future market balance supporting higher prices."
Copper's surge is not just about booming end demand. It is also about where the metal is parked and what policy might do next. A Comex premium, tariff jitters and thin LME stocks have all fed into today's prices. If you own miners or commodity funds, expect that cocktail to keep volatility lively as inventories move, deliveries arrive and Washington decides what to do about tariffs.
