The Lode

Last week’s first edition of The Lode asked whether metals scarcity was increasingly about availability rather than absolute supply. This week gives us something better: data to test that idea.

Tuesday’s LME positioning showed funds making an unusually large bet on zinc. Thursday’s Chinese inventory data then showed copper and aluminium drawing sharply — while zinc inventories barely moved. The financial and physical markets are not yet telling the same story.

Positioning Meets the Physical Market

Zinc has become the week’s most revealing metals trade. Investment funds have accumulated more than 110,000 tonnes of long LME zinc exposure, the largest collective bullish position since the exchange’s current reporting series began in 2018.

London’s physical market supports some of that conviction. Available inventory remains tight and nearby metal has traded at a substantial premium. China complicates it: Thursday’s SMM data put seven-region Chinese zinc inventory at 269,900 tonnes, down just 500 tonnes from the previous week and actually higher than Monday.

Copper looks very different. Chinese social inventories fell 24,900 tonnes in a week to 109,500 tonnes, with particularly strong destocking in Guangdong. Aluminium inventories declined another 23,000 tonnes to 852,000 tonnes. The strongest speculative trade therefore isn’t producing the strongest Chinese physical signal.

That doesn’t necessarily make zinc positioning wrong. The scarcity is concentrated in London, while much of the available refined metal sits in China. And behind that refined metal sits another constraint: exceptionally tight concentrate availability is putting severe pressure on Chinese smelter economics.

This creates the central question for zinc: can Chinese refined metal reach London faster than concentrate scarcity begins constraining Chinese production?

This week’s data don’t answer it. They tell us exactly where to look.

LME Positioning: Zinc Bulls Test the Market

Investment funds have accumulated more than 110,000 tonnes of zinc length, the largest collective bullish position in the LME’s current reporting series. Copper remains distorted by geographic inventory movements, while aluminium combines thin exchange liquidity with a less constrained global supply picture. The next test is physical confirmation.

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China Metals: Copper and Aluminium Draw, Zinc Doesn’t

Thursday’s SMM data separated the base-metals complex. Copper social inventories fell to 109,500 tonnes and aluminium ingot stocks to 852,000 tonnes. Zinc inventories were effectively unchanged at 269,900 tonnes. For now, copper has the clearer Chinese physical signal.

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Zinc: Deficit Reassessment Meets a Concentrate Squeeze

In April, ILZSG reversed its 2026 zinc outlook from the 271,000-tonne surplus forecast in October 2025 to a 19,000-tonne deficit. Four months later, the picture remains complicated: recent monthly data have continued to show substantial refined availability, concentrated heavily in China, while London remains tight.

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Positioning Is a Claim. Inventory Is the Evidence.

Three different datasets now tell us three different things about zinc. The April ILZSG forecast says the full-year refined market could move into a small deficit. Tuesday’s LME positioning says financial investors have embraced a much stronger tightening thesis. Thursday’s SMM data say China’s physical market isn’t short yet.

That distinction is useful. It prevents us from reducing the zinc story to a single surplus-or-deficit number. The immediate constraint is geographic — London needs metal that China has. High international prices are already encouraging Chinese refined zinc into the LME system, particularly through Hong Kong. If those flows accelerate, London’s scarcity should ease.

But the source of that relief is itself vulnerable. Chinese smelters are operating against exceptionally poor concentrate treatment economics. If concentrate tightness eventually forces production cuts, China’s ability to replenish the international market diminishes. This is why Thursday’s inventory numbers matter.

Copper requires less interpretation. A 24,900-tonne weekly Chinese inventory draw is direct evidence that available metal has declined. Aluminium is also destocking, although the expected seasonal acceleration in Chinese demand has yet to become convincing. Zinc is different — the bullish thesis may ultimately prove stronger than either, but right now it depends on a sequence of events that has not fully occurred.

Financial positioning tells us where investors expect scarcity. Physical inventories tell us whether it has arrived. For institutional investors, watching the gap between the two may be more useful than simply following the outright price.

Thursday — China Physical Inventories

The contrast is unusually clean. Copper and aluminium are drawing. Zinc isn’t. Next Thursday’s SMM release therefore becomes an important test. A meaningful zinc draw would begin aligning China’s physical market with the bullish signal already coming from London.

Copper — China’s 24,900-tonne weekly inventory draw provides the clearest physical tightening signal among the major base metals this week. Month-end smelter arrivals are the next test of whether that draw persists.

Aluminium — Inventories fell another 23,000 tonnes. The missing confirmation is demand: China’s traditional peak-season improvement has yet to become convincing.

Zinc — The standout positioning story. Record fund length in the current LME series sits alongside essentially unchanged Chinese inventories. China-to-LME flows and Chinese smelter operating rates now matter more than the headline annual balance.

Iron ore — Remains around the low-RMB700s/t area, with the market balancing supply disruption risk against a still-uncertain Chinese steel-demand outlook.

Gold — Remains elevated after its 2026 run, leaving real yields, the dollar and expectations for US monetary policy as the principal near-term macro variables.

Silver — Continues to combine precious-metal sensitivity with greater exposure to industrial demand, making the China manufacturing picture particularly relevant.

Platinum — The physical story remains distinct from gold. Successive annual deficits have reduced above-ground inventories available to absorb disruption, even as the expected 2026 shortfall is smaller than last year’s.

01 — China-to-LME Zinc Flows

Chinese metal has begun moving into the London system. Sustained acceleration would weaken the immediate scarcity argument.

02 — Chinese Zinc Smelters

Deeply negative concentrate treatment charges make operating rates increasingly important. Material production cuts would strengthen the tightening thesis.

03 — Copper Inventories

Another substantial Chinese draw would provide further confirmation that physical availability is tightening after August’s extreme LME dislocation.

04 — Aluminium’s September Test

Inventory is declining. Stronger downstream orders would turn that draw into a more convincing demand signal.

05 — Tuesday’s LME Positioning

Zinc’s unusually large fund long makes the next report important. Further additions without stronger physical confirmation would increase the significance of positioning risk.

The Bottom Line

This week has given us a useful sequence. Tuesday showed us where capital is positioned. Thursday showed us where the metal actually is. They don’t completely agree.

Copper has the strongest Chinese inventory draw. Aluminium is destocking without a convincing demand acceleration. Zinc has the strongest financial positioning but almost no weekly Chinese inventory draw. That doesn’t undermine the zinc thesis — it defines it.

If Chinese exports rebuild LME inventories, the geographic scarcity begins to normalise. If Chinese smelter output weakens and domestic inventories start drawing, the physical evidence begins catching up with the positioning. Until then, the most useful metals signal may not be the price. It’s the gap between what investors expect and what the warehouses show.

The Lode is published every Friday by Bloodstone Research, covering global metals, mining markets and the emerging economies that supply them. This document is for informational purposes only and does not constitute investment advice. Data derived from publicly available sources including the Bloodstone API. Independent financial advice should be sought before making any investment decision.

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