- Alcoa fell 2.12% to $49.97 USD ($69.08 CAD) on September 8, driven by a third consecutive sub-50 China manufacturing PMI reading.
- LME aluminum inventories rose 14% over four weeks to 623,000 tonnes, signalling near-term oversupply and weak Chinese industrial demand.
- Teck Resources (TSX: TECK.B) gained 0.66% to $95.59 USD, outperforming the base metals complex due to its diversified copper, zinc, and coal portfolio.
- Indonesia’s nickel ore export restrictions continue to support nickel prices modestly, partially offsetting demand-side weakness affecting Canadian producer Sherritt International.
Aluminum bore the brunt of base metals selling on September 8, 2026, as Alcoa Corporation — the most widely tracked North American aluminum proxy — fell 2.12% to $49.97 (approximately $69.08 CAD at the prevailing 1.3820 USD/CAD rate). The move came as fresh data reinforced concerns about slowing industrial demand in China, the world’s largest consumer of the metal, which accounts for more than 55% of global aluminum consumption annually.
China PMI Weighs on Industrial Metals Complex
China’s official manufacturing PMI for August came in below the 50-point expansion threshold for the third consecutive month, signalling contraction in factory activity and triggering a broad retreat across the base metals complex. Aluminum is acutely sensitive to Chinese industrial output, given its deep integration into construction, automotive, and packaging supply chains. London Metal Exchange (LME) aluminum inventories rose to 623,000 tonnes in the most recent weekly report — a 14% increase over the prior four-week average — adding further downward pressure as surplus inventory signals tepid near-term demand.
Zinc and tin also softened in sympathy, with traders citing the same macro headwinds. The broader base metals complex excluding copper saw average spot prices decline roughly 1.5–2.5% week-over-week, reflecting the widening discount the market is assigning to Chinese demand recovery expectations that have repeatedly disappointed in 2026.
Teck Resources Outperforms on Diversified Portfolio
Teck Resources (TSX: TECK.B) gained 0.66% to $95.59 — equivalent to approximately $132.11 CAD — outperforming the broader base metals selloff. Analysts attribute the resilience to Teck’s diversified commodity exposure, which spans steelmaking coal, copper, and zinc, as well as investor confidence following the company’s strategic repositioning after divesting its coal assets. Teck’s QB2 copper operation in Chile continues to ramp toward full capacity, and the company’s zinc assets in Trail, British Columbia, remain among the lowest-cost operations globally.
Canada is the world’s third-largest producer of aluminum and a top-five zinc producer, making Teck’s performance a bellwether for how Canadian miners navigate macro-driven volatility. With the USD/CAD rate at 1.3820, Canadian producers benefit from a natural hedge: costs are largely denominated in CAD while revenues are priced in USD, cushioning earnings when the loonie trades at a discount.
Supply Side: Indonesian Policy and Nickel Overhang
Indonesia’s ongoing nickel ore export restrictions continue to reshape the global supply landscape, though the more immediate pressure on the broader complex stems from demand-side deterioration. Vale SA, used as a nickel proxy, slipped 0.26% to $15.27, reflecting a market in relative equilibrium — Indonesian supply tightness is preventing a sharper selloff even as demand signals remain weak. For Canadian nickel producers such as Sherritt International, which operates assets in Cuba and maintains refining operations in Fort Saskatchewan, Alberta, the Indonesia dynamic has been a modest tailwind, but it is insufficient to fully offset the drag from subdued Chinese stainless steel output.
| Asset | Price (USD) | Price (CAD est.) | Change |
|---|---|---|---|
| Alcoa (Aluminum Proxy) | $49.97 | $69.08 | -2.12% |
| Vale SA (Nickel Proxy) | $15.27 | $21.10 | -0.26% |
| Teck Resources (TECK.B) | $95.59 | $132.11 | +0.66% |
| Copper (LME Spot) | $6.8175/lb | $9.42/lb | +3.34% |
Looking ahead, traders will closely monitor China’s September PMI release and any stimulus announcements from Beijing, which have the potential to rapidly reverse aluminum’s current trajectory. For Canadian investors, Teck’s outperformance underscores the value of commodity diversification in a market where single-metal exposure carries elevated macro risk heading into Q4 2026.