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    Copper price nears US record: supply, tariffs and smelter risks for mine planners

    July 22, 2026|

    Reviewed by Tom Sullivan

    Copper price nears US record: supply, tariffs and smelter risks for mine planners

    First reported on MINING.com

    30 Second Briefing

    Copper futures on Comex jumped 3.3% to $6.55/lb ($14,440/t), within 2% of June’s US record, as the New York premium over LME metal doubled to nearly $600/t on expectations of a phased US tariff of 15% in 2027 rising to 30% in 2028. Physical tightness is acute in China, with Shanghai Futures Exchange copper stocks down 82% since early May, Yangshan import premiums at $103/t, and 56% of LME inventories (166,025 t of 296,625 t) on cancelled warrants. Smelting constraints add further pressure, with Earth‑i’s SAVANT index showing 16% of global capacity inactive and Chilean smelter inactivity at 25.4%, alongside record‑low treatment charges and the planned closure of Japan’s 354,000 t/y Onahama smelter by early 2027.

    Technical Brief

    • LME three‑month copper reached $13,851/t, its highest level since 15 June.
    • Shanghai spot cathode premium over futures jumped to 435 yuan/t, from zero a week earlier.
    • Yangshan copper import premium climbed to $103/t, up from a $20/t low in January.
    • LME cash‑to‑three‑month spread has tightened towards backwardation, signalling constrained prompt metal availability.
    • Earth‑i’s SAVANT satellite index showed 16% of global smelter capacity inactive in Q2, with Chile worst‑affected.
    • Chilean smelter inactivity at 25.4% aligns with a 12.9% year‑on‑year fall in May copper output.
    • Japan’s 354,000 t/y Onahama smelter showed no operating signals in June and will cease concentrate processing by early 2027.
    • Comex warehouse stocks exceeded 630,000 t after eight consecutive quarters of inventory builds tied to tariff expectations.
    • Copper‑linked equities reacted strongly: Southern Copper +6.5%, Freeport‑McMoRan +6.3%, Teck +3.7%, BHP +3.6%, Glencore +3%.

    Our Take

    The 16% global smelter inactivity and 25.4% Chilean smelter downtime sharpen the strategic value of new refining capacity in politically stable jurisdictions such as Canada and the US, where several copper and critical‑minerals projects in our coverage are already seeking public‑backed infrastructure and financing support.

    Glencore’s presence here on the trading side, combined with its technology push around Jameson Cell and AI‑enabled APC in other recent coverage, suggests the major is positioning to capture value both from tight refined copper markets and from efficiency gains in treating lower‑grade or more complex copper ores.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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