Copper analysis — 2026-11-06

Our 9 October analysis argued that copper's tariff trade was deflating and regional scarcity easing, with Chinese inventories rebuilding and Guangdong premiums falling ¥500/t across every grade. Four weeks later each of those readings has inverted: Chinese major-region stocks have fallen towards 60,000 tonnes, the Yangshan bill-of-lading premium has set a record at $210/t, and Guangdong's SX-EW premium has risen roughly fortyfold. Demand did not move. Chile's supply forecasts were cut twice over the same period, and London accumulated metal throughout.

TL;DR

• Codelco said on 5 November that about 42,100 tonnes had been improperly recorded as production across 2024–25, and cut 2026 guidance from roughly 1.34 million tonnes to slightly above 1.2 million.
• Cochilco had already cut Chile's 2026 forecast by 330,000 tonnes on 30 October, with July to September the weakest quarter in at least twenty years.
• LME stocks rose about 44,700 tonnes in six sessions, and available warrants by more than two thirds since early October as cancellations collapsed.
• Chinese major-region inventories fell towards 60,000 tonnes while the Yangshan bill-of-lading premium set a record at $210/t, against fabrication rates 13.75 percentage points below last year.
• The ICSG still forecasts a 104,000-tonne global refined surplus for 2026, widening to 368,000 in 2027, and notes that its Chinese demand figures omit changes in unreported inventories.

Copper Dashboard

Exchange-published official and closing prices are used throughout; settlement, offer and closing quotations are distinct and are not compared with one another. The 2 October warrant figures are those published in Bloodstone Research's 9 October analysis. Chinese inventory figures are SMM survey estimates, rounded as published, and are not comparable with exchange stocks. Yangshan, Shanghai and Guangdong premiums are assessed against different benchmarks and are not interchangeable.

Codelco Restates What It Thought It Produced

Speaking at an extraordinary shareholders' meeting on 5 November, Codelco's chairman Bernardo Fontaine said the company had preliminarily identified around 42,100 tonnes of copper improperly recorded as production across 2024 and 2025, comprising unfinished material and duplicate entries across divisions, with nine employees dismissed and audits ordered. The preliminary impact on inventories is estimated at $120–140 million; SMM additionally puts the inventory overstatement at approximately 18,800 tonnes, a tonnage figure that appears in its account rather than in wire coverage. All the figures are described as preliminary. The shareholders' meeting backed the board, and Chile's government is convening outside experts to review the company's governance.

The distinction that matters is what the restatement does and does not represent. Forty-two thousand tonnes of copper have not disappeared, because they were never there to disappear. What has changed is the reliability of two years of reported output from Chile's state producer, among the largest in the world: historical series, and any balance built on them, carried metal that did not exist.

The forward guidance is the larger number and the one with physical consequences. Codelco has cut 2026 production from about 1.34 million tonnes to slightly above 1.2 million, expects around 1.3 million annually over four years, and has abandoned its 1.7 million tonne target for the end of the decade. First-half output had already fallen 11% to 564,000 tonnes. Separately, it halted the Andina beneficiation plant after a tailings-system blockage caused a spill that may have reached the Blanco River, with no duration published.

Chile's Forecast Had Already Been Cut

Cochilco revised its national projections on 30 October, six days before Codelco spoke. Chile's 2026 output forecast fell 330,000 tonnes to 4.94 million, and the 2027 forecast 470,000 tonnes to 5.08 million. The commission put 2026 output 8.4% below the 2024 level, described July to September as the weakest quarter in at least twenty years, and recorded September production of 387,870 tonnes against 456,647 a year earlier. BHP's Escondida, the country's largest mine, fell 23% to 252,600 tonnes in the producer's fiscal first quarter. Cochilco raised its 2026 price forecast to $6.18 per pound from $5.95 in the same document — a forecasting body cutting volumes and raising prices at once is an explicit statement about which side of the balance it considers binding.

The sequencing requires care, and it is where the simplest reading of this week fails. Cochilco's October revision already incorporated deterioration at Codelco and at other major Chilean operations, so the Codelco guidance announcement cannot be treated as a further reduction stacked on top of the national forecast; the two overlap to an extent that is not disclosed. What can be said is that the scale of one producer's revision is comparable to the entire global refined surplus projected three weeks earlier — a statement about the precision of the balance rather than an adjustment to it.

London Is Accumulating Metal

While Chilean supply forecasts were being cut, LME warehouses were filling. Total stocks rose from 274,000 tonnes on 30 October to 312,250 on 4 November and approximately 318,700 on 5 November, a build of roughly 44,700 tonnes across six consecutive rising sessions, and around 70,000 tonnes above the 248,650 recorded in our 9 October analysis.

The warrant composition has moved further than the headline, and it is the more useful measure. Available warrants stood at 225,650 tonnes on 30 October against 134,650 on 2 October, an increase of about 91,000 tonnes or more than two thirds, while cancelled warrants fell from 114,000 tonnes to 48,350 and the cancellation ratio from 45.8% to 17.6%, a fall of 28.2 percentage points. In early October much of the visible LME pool was already committed to leaving; it is now overwhelmingly available. The corresponding daily report for 5 November is not to hand, so the warrant split is quoted as at 30 October rather than carried forward — but the direction is unambiguous. Copper became easier to obtain in London through exactly the period in which Chinese buyers were paying records for it.

China Is Paying Records For the Same Metal

SMM put inventories across China's major regions at approaching 60,000 tonnes on 5 November, about 140,000 below the year-earlier level on its own comparison and some 40,000 below the roughly 100,000 we recorded on 8 October. The premium structure moved violently in the same direction, across three assessments measured against different benchmarks. The Yangshan bill-of-lading premium, which prices imported cathode still in transit, reached a record $210/t on 6 November against $120/t on 8 October, and SMM's #1 cathode in Shanghai averaged ¥2,100/t over the 2611 contract on 5 November against ¥710/t, including a ¥600/t single-day rise on 4 November that SMM says disrupted the futures-spot structure. Guangdong is starker still: high-quality cathode premiums went from ¥400/t to ¥1,950 and SX-EW from ¥40 to ¥1,640. Four weeks ago all three Guangdong grades fell by an identical ¥500/t in one session on a post-holiday arrival surge; they have since risen by between four and fortyfold.

Import economics turned with them. A week earlier the loss on importing cathode stood near ¥1,243/t; on 5 November the front-month margin ran from a ¥130/t loss to a ¥260/t profit, and SMM states the window turned profitable during the week, attributing the shift partly to a narrowing of the premium US prices have carried over international levels. It flags returning ex-China cathode as a potential supplement to supply, which would be the first sign of the flow away from China reversing.

Fabrication demand corroborates none of it. Secondary copper rod ran at 13.82% in the week to 5 November, down 13.75 percentage points year on year, with sector gross profit ¥243/t lower at ¥417/t. The cathode-rod to secondary-rod spread widened to ¥2,080/t, which should favour secondary material, but SMM reports raw-material premiums and invoice tax rates leaving that advantage largely on paper.

The Balance Says Surplus

Against all of this, the International Copper Study Group's October forecast describes a market in surplus and getting looser. Published on 14 October, it projects a global refined surplus of 104,000 tonnes for 2026, revised up from the 96,000 estimated in April, widening to 368,000 tonnes in 2027, with mine production growing 1.3% this year against refined usage of 1.5%. Output remains constrained at Freeport-McMoRan's Grasberg and Ivanhoe Mines' Kamoa-Kakula after incidents in 2025, with recovery expected in 2027 and already assumed in that surplus.

The ICSG attaches a caveat which deserves more attention than it receives: its Chinese demand figures omit changes in unreported inventories, and those changes can significantly shift the global balance. China is 59% of global refined consumption. In a year when Chinese visible stocks have fallen to roughly a third of their year-earlier level while SMM reports COMEX inventories at a record 731,428 tonnes, unreported inventory is not a rounding item. It is the mechanism being argued about.

This is where the week's observations become one picture. A global balance is a residual between two large estimated quantities, and this month both were revised: Chile's output forecast downward by 330,000 tonnes, and its state producer's reported history by 42,100. The scale is the point. The surplus projected for the whole of 2026, at 104,000 tonnes, is only about half again as large as the roughly 70,000 tonnes London added in a single month, and a balance that small relative to observable monthly inventory swings cannot settle an argument about regional availability.

Outlook

The question is no longer whether the physical market is tight, because the premiums answer that, nor whether the global balance is in surplus, because the ICSG's answer is explicit. It is whether reported balances can describe metal availability when the metal is distributed this unevenly and the inputs are being restated at this rate.

Two mechanisms will resolve it, and both are set out under Key Risks below. The first is the import window, which turned profitable during the week under review. The second is the Section 232 process: existing tariffs cover semi-finished copper products and certain derivatives, as modified in April 2026, while the proposed phased regime would impose 15% on refined copper from January 2027, rising to 30% in January 2028, subject to a further presidential decision.

Absent either, the likeliest path is continuation: a projected surplus accumulating in London and the United States, a shortage of immediately available metal in China, and premiums carrying the difference. That configuration has held for most of 2026, and nothing this week ends it.

Key Risks

Returning ex-China cathode. A profitable import window and a narrowing US price premium could draw metal back into China quickly, compressing record premiums with no change in demand. SMM warns explicitly of a pullback risk.

A Section 232 decision on refined copper. The proposed phased regime is unresolved. Imposition would entrench the US stockpile; abandonment would reopen the arbitrage the other way.

Codelco's figures are preliminary. The restatement, the inventory impact and SMM's tonnage estimate of it are preliminary with audits in progress, and the Andina halt has no published duration.

Balance revisions in either direction. The ICSG surplus is a residual of two large estimates, one of which excludes unreported Chinese inventory, and recovery at Grasberg and Kamoa-Kakula is already assumed in the 2027 figure.

Fabrication demand. Secondary rod operating rates 13.75 percentage points below last year, with falling margins, are not consistent with record premiums. Premiums sustained by restricted availability rather than orders can correct quickly.

Intelligence Monitoring Points

• SMM's Yangshan premiums and the front-month import margin, as the clearest test of whether ex-China cathode is returning.
• LME daily warehouse movements, specifically the available and cancelled warrant split rather than the headline total, which has been the more informative series this month.
• Chinese major-region social inventory, where a build from approaching 60,000 tonnes would confirm arrivals rather than consumption.
• Any presidential decision on the proposed refined-copper regime, with the COMEX-to-LME relationship as the confirming indicator.
• Cochilco's monthly production data against the revised 4.94 million tonne path, and the outcome of the Codelco audits.

FAQ

Does Codelco's restatement mean copper supply has been lost?

No. The restated tonnes were never produced, so no physical metal has been removed from the market. What the restatement affects is the reliability of reported output history and of any balance calculated from it. The guidance cut, from about 1.34 million tonnes to slightly above 1.2 million for 2026, is the part with physical consequences.

Why are Chinese premiums at records while LME stocks are rising?

Because the two measure different things in different places. LME total stocks rose about 44,700 tonnes in six sessions to approximately 318,700 on 5 November, with available warrants up more than two thirds since early October, while Chinese major-region inventories fell towards 60,000 tonnes. Metal has become easier to obtain in London and harder in China.

Has the United States imposed a tariff on refined copper?

Not established. Existing Section 232 tariffs cover semi-finished copper products and certain derivatives, as modified in April 2026. The proposed phased regime would impose 15% on refined copper from January 2027, rising to 30% in January 2028, subject to a further presidential decision. The midterm elections do not alter that status.

The Bottom Line

Copper's latest divergence is not between a market in surplus and one in deficit. It is between a global balance that remains positive on current estimates and a physical market in which available metal is distributed unevenly. Chile's production revisions have made that balance less certain, while rising LME stocks and record Chinese premiums demonstrate how differently the same market can behave across regions.

The physical reversal coincided with substantial revisions to Chilean supply expectations, but the more direct explanation of regional premiums lies in where the metal is and what it costs to move. Demand explains none of it. For scale, our 9 October analysis recorded an official open-outcry three-month observation of $14,415/t against an official three-month offer of $14,030/t on 5 November — a move of that order sitting alongside Guangdong premiums that rose between four and fortyfold.

What the week leaves is a market whose central quantity is less knowable than the confidence around it suggests. The ICSG projects a 104,000-tonne surplus while excluding unreported Chinese inventory from its demand side, Chile has revised its national forecast twice this autumn, and its state producer has restated two years of output. The numbers keep moving, and the premiums are tracking location rather than the balance.

Sources

International Copper Study Group — October 2026 forecast, global refined copper surplus of 104,000 tonnes for 2026 and 368,000 tonnes for 2027

Cochilco — Chilean copper production and price forecast revision, 30 October 2026

Reuters — Codelco lowers 2026 guidance, confirms 42,100 tons output error, 5 November 2026

BNamericas — Chile's Codelco raises overstated copper output for 2024-25 to 42,100t, 5 November 2026

Shanghai Metals Market — Codelco production overstatement and 2026 guidance cut, 6 November 2026

Shanghai Metals Market — Codelco halts Andina mine after tailings spill, 6 November 2026

Shanghai Metals Market — Copper morning meeting summary, Chinese inventories, spot premiums and COMEX stocks, 6 November 2026

Shanghai Metals Market — Imported copper premiums and ex-China cargo flows, 6 November 2026

Shanghai Metals Market — Secondary copper rod weekly review and operating rates, 6 November 2026

London Metal Exchange — daily warehouse movements and official prices

United States Government Publishing Office — Section 232 copper proclamation and proposed refined-copper measures

Previous edition: Bloodstone Research — Copper analysis: The Tariff Trade Deflates, 9 October 2026

Companion: Bloodstone Research — China Metals Intelligence: Copper's Shortage Is a Location Problem, 6 November 2026