U.S.-China Relations
NextFin News - Copper held a modest drop on Monday as traders priced a growing possibility that the proposed US tariff on refined copper imports may never be imposed, a policy gamble that has already pulled more than 600,000 metric tonnes of metal into American warehouses and left the rest of the world tighter than headline supply data suggest.
Benchmark three-month futures on the London Metal Exchange traded near $14,340 a tonne, down 0.5% on the day, with cash copper at $14,496 a tonne as of October 19. The metal has surrendered part of a 2026 rally that pushed prices to records on both sides of the Atlantic, with COMEX copper touching an all-time high near $6.78 a pound in late August. The retreat reflects a shift in the market's central question: no longer whether the tariff will lift US prices, but whether it will ever arrive at all.
The tension at the heart of the market is simple. The US Commerce Department has recommended a universal 15% duty on refined copper starting January 1, 2027, rising to 30% on January 1, 2028, but the White House has not ruled. Until it does, traders have a financial incentive to keep imported copper in US warehouses rather than ship it to Asia or Europe. That behavior drains inventories elsewhere and supports prices outside the United States even as the global market sits in surplus. A tariff that does not yet exist has become the single largest determinant of where copper physically sits.
The Tariff That Hasn't Happened Is Already Moving Metal
The US tariff architecture on copper is already substantial for some products. Effective April 6, 2026, a 50% tariff applies to the full value of semi-finished copper products, with a 25% duty on copper-intensive derivative products — 10% if at least 95% of the copper, steel, and aluminum in the product is US-sourced. A June 1 proclamation, effective June 8, added a floor ensuring that imports from trade-deal partners face a combined rate of at least 15%. In early August, the Bureau of Industry and Security proposed adding 14 more derivative articles to the scope of the duties, ranging from brass musical instruments to parts of welding machines and certain hydraulic motors. What remains undecided is the treatment of refined copper itself — the cathodes and wire rod that feed American manufacturers.
That unresolved question has produced an extraordinary stockpiling response. COMEX copper inventories reached a record 612,500 metric tonnes on August 25, after 46 consecutive daily builds — up nearly 700% since February 2025. US refined copper imports exceeded 200,000 metric tonnes in July 2026, the highest monthly total in 12 years. Metal that would otherwise sit in London or Shanghai warehouses has been rerouted to the United States, where it is effectively trapped by the option value of the pending duty. Every tonne held in a COMEX warehouse is a tonne that cannot settle a contract on the LME.
The cost of that rerouting shows up in the price structure outside the US. On August 11, LME cash copper settled at $14,424.50 a tonne, $207.50 above the three-month contract — a backwardation that widened from about $34 a tonne at the end of July. Backwardation, where immediate delivery costs more than future delivery, signals a shortage of metal available right now rather than a deficit of annual supply. By August 12, LME stocks had fallen 14%, more than 35,000 metric tonnes from the end of July, to 214,550 metric tonnes. As of October 19, LME copper warehouse stock stood at 232,200 metric tonnes, down 9% over the prior 30 days and below the 250,000-tonne mark since September 30. Shanghai's on-warrant stocks fell more than 80% from March to mid-August, to 69,731 metric tonnes.
The mechanism is straightforward but worth tracing in full, because it is the channel through which a US policy decision moves a London price. A tariff on refined copper imports makes foreign metal more expensive for US buyers. Anticipating that, traders buy metal now and park it in US warehouses before the duty takes effect. That buying lifts the COMEX price above the LME price, creating an arbitrage: sell metal into the US premium, ship it across the ocean, warehouse it on COMEX. As metal leaves LME-approved warehouses, the deliverable pool for European and Asian buyers shrinks, and the cash-three-month spread flips into backwardation. The US has not taxed anything yet, but the expectation of the tax has already reallocated global supply.
The precedent for this behavior is the semi-finished tariff imposed in August 2025. When that 50% duty took effect, the COMEX-LME spread blew out to a record $2,937 a tonne at the end of July 2025 as importers rushed to beat the deadline. The current spread — roughly $550 a tonne, or close to 4%, as of late August — is far smaller, reflecting the fact that the refined duty remains a recommendation rather than a proclamation. The market is pricing a lower probability of action, but the inventory response has been larger because refined copper is a much bigger trade flow than semi-finished products.
Why the Market Is Now Doubting the Tariff Will Arrive
After months of positioning for the duty, some bulls are growing wary that it may not be adopted at all. President Donald Trump, nearing the midpoint of his second term, has shown a willingness to pause or recalibrate trade measures when affordability becomes a political concern. The lead-up to the 2026 mid-term elections has made consumer and industrial price pressure a sensitive issue, and copper is a direct input into wiring, appliances, vehicles, and construction. A duty that raises costs for US manufacturers six months before an election carries political risk that a second-term administration may prefer to avoid.
Goldman Sachs Research, which had built its copper forecast on the expectation of a 15% refined copper tariff announced by mid-2026, flagged the risk that the decision could be delayed. The bank's analysts wrote:
"There's uncertainty around that outcome as affordability remains a key focus in the lead up to US mid-term elections which could cause the tariff decision to be delayed."
The bank went further on the timing risk: "if the tariff announcement itself is delayed until 2027, that could be bearish for copper prices as the probability of a tariff reduces and focus shifts back to the well-supplied global market." That is a meaningful reversal for a forecast that assumed the duty would arrive. It is also a signal that the consensus positioning — long copper, short the policy risk — is crowded enough that a delay would force unwinding.
The market has begun to price that possibility. As of mid-August, the COMEX premium implied only a 14.6% chance that the recommended 15% refined copper tariff would take effect on January 1, 2027 — a sharp discounting of what had been treated as a base case through the spring. When the probability of the tariff falls, the rationale for holding metal in US warehouses weakens, and the door opens for that stockpile to return to the global deliverable pool. The premium that once represented tariff value becomes, instead, a storage cost with no payoff.
This is the second-order risk that the market is only now confronting, and it is where the real analytical weight lies. The first-order effect of the tariff threat was mechanical and obvious: metal moves to the US, inventories fall elsewhere, prices outside the US rise. That trade has been priced since early 2026. The second-order effect runs through expectations rather than physical flows: if the tariff is delayed or abandoned, the stockpiling incentive reverses, US-held copper becomes exportable again, and the scarcity premium embedded in LME prices evaporates. The same policy uncertainty that built the rally can unwind it — without any change in actual consumption, without a single additional tonne of mine supply, and without any shift in Chinese demand. The market discovered that it had been long a policy outcome, not a commodity shortage.
There is a third-order implication that few participants are discussing. If the refined copper tariff is abandoned while the semi-finished and derivative duties remain, the tariff regime itself becomes internally inconsistent: US fabricators pay 50% on semi-finished imports but face no duty on refined cathodes. That would distort domestic investment toward refining capacity rather than fabrication, and could invite fresh Section 232 petitions from the fabricators who lose the level playing field the current structure was meant to create. Policy incoherence is itself a source of volatility.
The Fundamental Backdrop: Surplus Today, Deficit Tomorrow
The near-term fundamental picture cuts against the rally. The International Copper Study Group reported a refined copper surplus of 221,000 metric tonnes in the first five months of 2026, up from 117,000 metric tonnes a year earlier — the surplus nearly doubling despite the price rally. Global mine output fell 1.6% over the same period, with declines in Chile, the Democratic Republic of Congo, and Indonesia, but the ICSG's April forecast still projected refined output growth of just 0.4% for the full year. Slow supply growth is bullish in isolation; paired with a doubling surplus, it says demand is weakening faster than supply.
Goldman Sachs Research estimates the global copper market recorded a 600-kilotonne surplus in 2025, the largest absolute surplus since 2009, and raised its 2026 surplus forecast to 300,000 tonnes from a previous 160,000 tonnes. The bank puts copper's fair value at around $11,500 a tonne, with a fourth-quarter 2026 forecast of $11,200 — well below current levels. Eoin Dinsmore, the bank's analyst, was direct:
"We feel that the price has overshot its fair fundamental level. A clear decision on US refined copper tariffs should serve as a catalyst for a correction."
Yet the long-term narrative remains bullish, and that is what keeps a floor under prices. The International Energy Agency's Global Critical Minerals Outlook 2026 projects copper supply falling 25% short of demand by 2035, driven by electrification of transport and power infrastructure. J.P. Morgan Global Research forecasts a refined copper deficit of around 330,000 tonnes in 2026, with an average price near $12,075 a tonne and a peak around $12,500 in the second quarter. Citigroup sees copper potentially exceeding $13,000 a tonne and approaching $15,000 if supply disruptions and low inventories persist. A consensus poll of 27 analysts conducted in late July put the 2026 average at $13,169 a tonne — below where the metal trades today, implying the street expects further upside even after the recent pullback.
The divergence between the near-term surplus and the long-term deficit is not a contradiction; it is a timing problem. New copper mines take well over a decade to permit and build, so supply cannot respond to today's price signal within the current cycle. Demand from data centers, grid expansion, and electric vehicles is accelerating now, on a policy timeline measured in years, not decades. The structural deficit is real but lives in the 2030s; the cyclical surplus is real and lives in 2026. The market is trying to price both at once, and policy uncertainty is the wedge between them. That wedge is what makes copper unusually sensitive to Washington headlines: the metal's long-term scarcity gives bulls conviction to hold through a short-term surplus, while the surplus gives bears a fundamental anchor below the current price.
The Counter-Thesis: Scarcity Outside the US Is Not an Illusion
The strongest case against a sharp correction is that the physical tightness in London and Shanghai is genuine, not merely a financial artifact of the tariff trade. LME stocks below roughly 215,000 metric tonnes, combined with backwardation above $150 a tonne, have historically preserved pricing power for suppliers of immediately deliverable metal. With LME inventories at 232,200 tonnes and still draining at a 9% monthly pace, and Shanghai's deliverable pool down more than 80% since March, the metal available to settle contracts outside the US is genuinely thin. A supply shock — a strike in Chile, a disruption in the DRC, or stronger-than-expected Chinese stimulus — could send prices higher before any tariff decision arrives, and no amount of US-held inventory can relieve tightness in London quickly enough to matter for contract settlement.
Goldman Sachs itself acknowledges this near-term support, even as it calls the rally mature. Dinsmore wrote:
"We are very likely in the late stages of this rally, but US economic growth, AI spending, and US stockpiling will likely remain supportive in the coming months."
The bank does not expect the price above $13,000 to be sustained, but it does not call for an immediate collapse either. The correction it anticipates is conditional on a tariff decision releasing US-held metal back into global trade. That conditionality is the crux: the bearish fundamental view and the bullish physical view are both correct, and the tariff ruling is the switch between them.
The falsifying signal for the bearish read is specific and observable. If LME copper stocks continue to fall below 200,000 metric tonnes while backwardation widens beyond $250 a tonne, the scarcity premium is being driven by physical demand rather than tariff positioning, and the correction thesis fails. Conversely, if the White House formally rules out or indefinitely delays the refined copper tariff and LME inventories rebuild above 300,000 tonnes, the scarcity premium should unwind quickly toward the $11,000–$11,500 fair-value band. Both thresholds are published daily by the exchange and can be tracked without interpretation.
What to Watch: The White House Ruling as the Pivot
In the short term, copper will trade on tariff headlines and inventory prints. Any signal from the White House or the Commerce Department on the refined copper duty will move the market more than the next demand data point, because it determines whether 600,000-plus tonnes of COMEX-held metal remain locked in the United States or re-enter global trade. Traders should watch the Commerce Department's reporting timeline on US dependence on imported copper, any Section 232 proclamation, and the weekly LME stock reports for the first sign of rebuilding.
Over the medium term, the fundamental surplus should reassert itself if the tariff risk recedes. Goldman Sachs' fair-value estimate of $11,500 a tonne and its raised 2026 surplus forecast point to downside from current levels once the policy overhang clears. Mining equities, which have rallied with the metal, would face margin pressure if prices revert toward fair value. The Global X Copper Miners ETF was trading at $79.69, down 0.36% on the day, and well below its 52-week high of $99.99 — a market that has already begun to discount a price pullback even before the policy decision arrives.
The exposure split is uneven across the value chain. Non-US copper consumers — European and Asian fabricators, cable makers, and appliance manufacturers — are the most exposed to the downside scenario, because a tariff abandonment would flood their deliverable pools and compress the scarcity premium that has supported their input costs. US fabricators are the asymmetric beneficiaries of the current regime: they pay the semi-finished duty but, so long as the refined duty remains pending, can still access untaxed cathodes while their foreign competitors face tighter physical markets. Copper miners sit in the middle: they benefit from any price strength, but a policy-driven correction would hit earnings before the structural deficit reasserts itself.
Over the long term, the structural deficit narrative remains intact. The IEA's 2035 shortfall projection and the decade-long lead times for new mines mean that any price correction is more likely to be a cyclical pause than the end of the bull market. Investors in copper producers are effectively buying a long-dated option on electrification demand, with 2026 policy risk as near-term volatility. The question is not whether copper is scarce in 2035 — the evidence says it is. The question is whether a 2026 tariff decision can move prices enough, soon enough, to matter for investors with shorter horizons.
Three scenarios frame the path ahead. The base case is a delayed tariff decision that keeps metal in US warehouses through 2026, supporting LME prices in the $13,000–$15,000 range while the global surplus caps upside. The upside case is a formal tariff announcement for 2027, which would validate the stockpiling trade and could push COMEX toward its record near $6.78 a pound while draining LME stocks further. The downside case is an explicit abandonment or multi-year delay of the refined copper duty, which would unlock US inventories, rebuild LME stocks, and drive prices toward the $11,000–$11,500 fair-value band.
The copper market has spent 2026 pricing a tariff that does not yet exist. The risk now is not that the duty arrives — it is that it never does, leaving the world with a record American stockpile and a scarcity premium with nowhere to live.
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