NextFin News - Copper held above $14,000 a tonne on Thursday as traders weighed the US Treasury Department's surprise decision to double the size of its longer-dated bond buybacks - a move that pushed Treasury yields lower, softened the dollar, and handed fresh support to dollar-denominated metals. The metal's resilience underscores a market caught between two forces: a liquidity signal from Washington that is helping risk assets, and a physical copper squeeze that traders say is far from over.
The benchmark three-month contract on the London Metal Exchange traded above the $14,000-a-tonne mark, after powering past that level last week to reach its highest price since a speculative spike to record territory in late January. In New York, the story is even starker: Comex copper touched a record $6.7045 a pound in mid-August, up roughly 17% in 2026 and more than 50% over the past 12 months. The move comes a day after the Treasury Department said it would increase buyback operations for 10-to-20-year and 20-to-30-year nominal coupon securities to at least $4 billion per operation from a maximum of $2 billion, effective September 9 and running through November 4.
The announcement was a market event in its own right. The 30-year Treasury bond yield fell 9 basis points to 5.194%, its largest one-day drop since October, while the 10-year yield settled near 4.65%. Both had climbed earlier in the week, with the 30-year touching 5.323% on Tuesday - a 19-year high, the highest level since 2007 - amid investor anxiety over US fiscal deficits, heavy borrowing by artificial-intelligence companies, and inflation that has pushed borrowing costs higher around the world. The Treasury's intervention, coming just two weeks after it published its quarterly buyback schedule, was widely read as a signal that Washington is willing to lean against a disorderly move in the long end of the bond market.
For copper, the transmission was swift. Lower US yields trimmed the dollar's yield advantage, and the greenback softened. Because copper is priced in dollars, a weaker currency makes the metal cheaper for buyers holding other currencies, and it reduces the carry cost of holding inventories. That is the standard, well-worn channel from rates to commodities - and it explains why the metal held its ground on Thursday. But the Treasury action is only the latest chapter in a copper story that has been building for months, driven by a physical market that is tightening faster than the paper market can price in.
The Squeeze Beneath the Price
The most important fact about this rally is not the $14,000 handle - it is what is happening to metal that actually exists. A massive flow of copper into the United States, made in anticipation of a possible tariff on refined imports, has drained availability elsewhere and pushed global benchmark prices higher. US importers brought in more than 200,000 tonnes of refined copper in July, the largest monthly volume in at least 12 years. Added to what is already sitting in Comex warehouses, LME-registered stock, and private port storage, the country's copper stockpile is now pushing past 1 million tonnes.
That stockpiling has a cost, and the market is charging for it. Cash copper has been trading at a premium of as much as $434 a tonne to the three-month contract - the widest gap since the supply squeeze of 2021 that forced the exchange to intervene. At the peak of the panic, buyers scrambling for prompt metal paid record prices near $14,500 a tonne. The cash-to-three-month spread, a barometer of immediate tightness, widened to as much as $545 a tonne at one point, the most since 2021, before easing after traders delivered more than 20,000 tonnes into LME warehouses in a single day - the biggest one-day build in on-warrant stock since April.
The trigger for all of this is a policy decision that has not yet been made. On August 1, 2025, President Donald Trump imposed Section 232 tariffs at a 50% rate on semi-finished copper products, citing national security concerns - but refined copper imports were excluded at that time. The Department of Commerce has since recommended a 15% tariff on copper raw-material imports starting January 1, 2027, stepping up to 30% in January 2028, and was due to deliver an updated report by June 30, 2026 to enable action on refined copper. Refined copper accounts for 40% to 50% of US supply. The result is a market holding its breath: traders are front-running a decision that could reshape where metal flows for years.
The January record spike offers a warning about how fast this market can move on sentiment alone. Copper surged by the most in more than 16 years after a wave of buying from Chinese investors, gaining as much as 11% in a single session to trade above $14,500 a tonne for the first time, before a sharp retracement. That episode had nothing to do with physical scarcity and everything to do with positioning - a reminder that the same market can manufacture a squeeze out of paper flows as easily as out of missing tonnes.
What the Treasury Move Actually Does - and What It Does Not
The buyback announcement sent a clear signal, but it is important to be precise about the mechanism. Treasury buybacks of longer-dated bonds do not reduce the government's debt load. They swap one maturity for another - buying back old, less-liquid bonds and issuing new ones, or simply supporting prices in the long end. The stated purpose is liquidity support, not deficit reduction.
"This increase in buyback operation sizes reflects Treasury's desire to provide greater liquidity support in longer-dated nominal sectors where there is consistent strong sponsorship from market participants, as evidenced by the significant volume of high-quality offers Treasury routinely receives in longer-dated buyback operations," the Treasury Department said in a statement.
Market participants read the timing as deliberate. The announcement came after the 30-year yield had climbed back to its highest point since 2007 earlier in the week, and with traders preparing for a $16 billion auction of new 20-year bonds.
"It is not an accident, in my view, so the more important part is the signaling from it," said John Briggs, head of US rates strategy at Natixis North America. "If yields go too far, Treasury will try and fight it - and now we know where some pain points are."
That signaling effect is what reached copper. A lower long-end yield compresses the dollar's carry advantage, weighs on the currency, and lifts the present value of future commodity demand - the standard transmission from rates to metals. But the buyback does not add a single tonne of copper to any warehouse, and it does not resolve the tariff question that is driving the physical squeeze.
"This is NOT a debt paydown, it is just a rearrangement of the maturity schedule of Treasuries," wrote Peter Boockvar, chief investment officer at One Point BFG Wealth Partners, cautioning against reading the move as a structural fix to the fiscal picture.
The Cyclical Support Versus the Structural Squeeze
This is where the analysis has to separate two very different forces, because conflating them produces the wrong conclusion. The Treasury buyback is a cyclical, mean-reverting support. It is a liquidity signal that works through sentiment, the dollar, and discount rates - and when the signal fades, or when yields find a new equilibrium, the support fades with it. The evidence that this is cyclical is straightforward: the operation has a defined end date of November 4, it does not change the quantity of copper available to consumers, and history shows that rate-driven metal rallies retrace when the rate move reverses. The 30-year yield's 9-basis-point drop is the kind of move that can be given back in a single session if the next inflation print surprises - and with it, the dollar support that is propping up copper.
The copper squeeze, by contrast, has structural elements that will not self-correct quickly. Three pieces of evidence support that read. First, the flow of metal into the United States is a response to a policy regime - a tariff structure that, once in place, would persist for years rather than quarters. Second, extending tariffs to refined copper would tighten supply until new refining and smelting capacity comes online, a process expected to take several years; analysts at Jefferies have noted that a six-to-twelve-month delay remains possible, which itself argues that the adjustment is measured in years. Third, demand is being underwritten by a multi-year build-out: power grids, electric vehicles, and data centers are all copper-intensive, and that demand does not reverse when the dollar ticks.
Even so, the market is not ignoring the risks. Goldman Sachs, in April, maintained a 2026 copper price forecast of $12,650 a tonne - well below current levels - and kept its estimate of a 490,000-tonne surplus for the year. The bank flagged supply risks from potential sulphuric-acid shortages should disruption to shipping through the Strait of Hormuz continue, noting that China's ban on sulphuric-acid exports from May 1 could put 200,000 tonnes of Chilean production at risk, roughly 1% of global supply, given that Chile sourced about a third of its acid from China in 2025. Sulphur and sulphuric acid are key inputs for solvent extraction and electrowinning, a process that accounts for 17% of global copper supply.
That divergence - a bank forecasting a surplus and a $12,650 average price while the physical market screams scarcity - is the heart of the current tension. The paper market is pricing a balanced-to-loose global balance; the physical market is pricing a shortage. Either one of them is wrong, or they are pricing different horizons. The backwardation that gripped the LME earlier this month - and then collapsed within days after 20,000 tonnes hit the sheds - suggests the answer may be both: structurally tight at the front end, where prompt metal is genuinely scarce, and structurally loose in the background, where enough metal exists to flood the market the moment the tariff incentive flips.
The Counter-Thesis: This Is a Tariff Trade, Not a Supercycle
The strongest case against the structural-squeeze reading is also the simplest: much of what looks like scarcity is an artifact of a trade that could unwind overnight. The million-plus tonnes of copper now sitting in US warehouses exists because traders are betting on a tariff. If the administration delays the decision, narrows the scope, or offers exemptions - as it has done repeatedly across other sectors - the incentive to hold metal in the United States evaporates. Metal would flow back out, the cash premium would collapse, and the backwardation that has been supporting the front of the curve would normalize.
There is precedent for exactly this kind of whipsaw. US copper futures plunged roughly 20% in late trading on a Wednesday after President Trump unveiled 50% tariffs on copper products but not on the raw material itself - a reminder that the policy path has been anything but linear. The Department of Commerce's own recommendation - 15% starting in January 2027, rising to 30% a year later - is more modest than the 50% rate applied to semi-finished products, and it comes with a delay built in. A six-to-twelve-month postponement, which analysts have flagged as possible, would give the market ample time to adjust without a scramble.
The falsifying signal is concrete: watch the LME cash-to-three-month spread and the direction of US inventories. If the spread narrows back toward its pre-squeeze range - below roughly $100 a tonne - while US stockpiles continue to build rather than draw, the physical-tightness thesis is broken, and the $14,000 level becomes a policy-driven artifact rather than a reflection of genuine scarcity. A second falsifier: a formal announcement that the refined-copper tariff decision is deferred beyond the end of 2026, which would remove the stockpiling incentive that is pulling metal out of the global market. Either signal would shift the burden of proof back to the bulls.
What Comes Next
In the short term - days to weeks - copper is being driven by liquidity and positioning. The Treasury buyback signal, a softer dollar, and the unwinding of the bond-market rout are supportive. The base case is that the metal holds in the $13,800-to-$14,500 range as long as the dollar stays bid down and no fresh tariff announcement lands. An upside case opens if the administration announces the refined-copper tariff ahead of schedule, or if another supply shock - a strike at a major mine, or an escalation in the Strait of Hormuz - hits a market with no slack. That could push prices back toward the January record above $14,500.
Over the medium term - the next quarter to a year - the tariff decision dominates. If a 15% duty takes effect in January 2027 as recommended, the two-price market - a premium US price and a discounted rest-of-world price - becomes entrenched, and US-facing producers benefit while consumers absorb the cost. If the decision is delayed or watered down, the premium compresses and the rally loses its policy fuel.
Over the long term - the multi-year horizon - the structural question is whether the energy transition and the AI-driven build-out of power infrastructure create a persistent deficit that no amount of policy uncertainty can suppress. That is the case the bulls are making, and it rests on demand that is already visible in grid and data-center investment, not on a tariff bet. But it is a thesis that requires new supply to come online slowly - and history suggests that high prices are an excellent incentive for exactly that.
For now, copper sits at the intersection of two Washington stories: a Treasury Department trying to steady the bond market, and a White House weighing a tariff that could redraw global metal flows. The metal is holding above $14,000 because the market is being paid to wait. The risk is that when the wait ends, the answer determines whether this was a structural repricing - or just the most expensive inventory trade in a decade.
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