The Lode

Last week every short book in the complex grew. This week none of them did in unison.

Copper funds added 4,129.30 longs and covered 609.28 shorts, lifting net length 4,738.58 lots to +44,557.28 — the cleanest bullish composition the metal has produced in a month, and enough to recover 55.8% of the decline that ran from 28 August to 18 September. Aluminium moved the same way, adding longs almost three times faster than shorts. Lead, the only net-short metal in the complex, saw its long book expand 38.4% in a fortnight.

Zinc and nickel went the other direction. Zinc shorts grew 3,949.65 lots against 1,608.44 new longs, a third consecutive week of the same mechanism. Tin barely moved.

Underneath, China went into National Day with aluminium ingot inventories at 638,000 tonnes — a fresh 2026 low, after a 40,000-tonne weekly draw and 118,000 tonnes across the preceding fortnight. Copper stocks were lean in Shanghai and Jiangsu, zinc and lead concentrate treatment charges deteriorated further, and nickel kept its buffers.

The one metal where financial and physical signals converged most tightly is also the one where the price refused to confirm either.

LME Positioning Intelligence — Copper Bulls Return as Metals Funds Split

Funds rebuilt copper longs decisively while zinc moved the other way. The complex has no common direction for the first time in a month.

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China Metals Intelligence — Aluminium Inventories Hit 2026 Low

Primary ingot stocks fell to 638,000 tonnes before National Day, while copper stayed lean and zinc and lead tightened upstream.

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Lead Intelligence — Tightening at the Edges, Surplus at the Centre

Four lead indicators tightened in September. Three didn’t move at all — and the price finished the month where it started.

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LME Investment Fund Positioning

Positions as at 25 September 2026, published 29 September. Investment Funds, non-risk-reducing, in lots.

Fund positions as a share of open interest, long and short:

All six metals reconcile exactly with the preserved 18 September vintage. No restatement this week, unlike the previous report, where tin’s figures did not match.

China Physical Signals

Shanghai Metals Market, data through 30 September 2026.

Inventory definitions differ by product and region and should not be aggregated.

01 — The First Post-Holiday Aluminium Reading

Stocks enter National Day at a 2026 low of 638,000 tonnes. A build is normal; its size against historical holiday patterns is the test of whether September’s draw was seasonal or structural.

02 — Whether Copper’s Rebuild Holds

The 4,738.58-lot increase was driven principally by 4,129.30 new longs, rather than short covering alone. One more week of long accumulation would make the reversal considerably harder to dismiss as a single-week repositioning.

03 — Zinc’s Short Book at 74,119.90 Lots

Three consecutive weeks of accumulation, in the contract where funds hold their largest positions relative to open interest on both sides.

04 — Lead’s Cash-to-Three-Month Spread

Around $31 contango at month-end, having stayed positive through a month in which stocks fell 11.7%. A move towards backwardation would be the first exchange-level confirmation of tightness.

05 — Aluminium’s Short Base

It has grown in each of the last two weeks from an unusually thin start, while the net long remains by far the largest in the complex.

06 — Chinese Refined Lead Output as Maintenance Ends

More than 20,000 tonnes were lost to September outages; mainstream smelters planned to run through the holiday.

The Bottom Line

The complex has stopped moving together, and lead shows why that matters.

In lead, almost everything tightened through September. Exchange stocks fell 47,325 tonnes. Cancelled warrants rose. Chinese concentrate charges went from RMB150 to RMB100 domestically and from −$170 to −$185 on imports. Fund longs expanded by more than a third. On an isolated reading, those are the ingredients of a tightening market.

The price finished September at $1,906, having started it at $1,908. The curve stayed in contango throughout. ILZSG still forecasts a 109,000-tonne surplus. And stocks, after that 11.7% draw, remain at the 96th percentile of a nineteen-year series — having approached 500,000 tonnes in July during an extraordinary warehouse build that is now unwinding.

The tightening was real. The price chose not to validate it. That distinction matters. Metal leaving an LME warehouse is not necessarily metal being consumed, particularly in a contract where warehouse economics have played such a large role. A concentrate squeeze does not automatically become refined-metal scarcity, particularly when September maintenance removed more than 20,000 tonnes of Chinese primary output and that capacity is now returning.

That is the discipline the rest of the complex now requires. Copper’s long rebuild, aluminium’s 2026-low inventory and zinc’s three-week short build are all genuine observations. Whether they develop into durable market signals is a different question.

October provides the test. Chinese plants restart, holiday inventories land, the next fund positions arrive and the forward curves keep score.

Data: LME MiFID II Weekly COTR, positions 25 September 2026; Shanghai Metals Market releases through 30 September 2026; LME official prices and stocks.

The Lode is published every Friday by Bloodstone Research, covering metals, mining and the markets that price them. This document is published by Bloodstone Research for informational and institutional research purposes only. It does not constitute investment advice, an investment recommendation, an offer or solicitation to buy or sell any financial instrument, commodity or security, or a forecast of future performance. Market conditions and data may change without notice. Readers should conduct their own analysis and, where appropriate, seek independent professional advice before making investment decisions.

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