U.S.-Canada Tariff War: Why Metals Stock Pops Won't Last
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- The U.S. and Canada are now operating under dueling tariff regimes: a 50% U.S. tariff on Canadian goods met by Canada's $20 billion in retaliatory tariffs on 700+ U.S. products (rates 15–50%), effective Sept. 8, covering dairy, seafood, appliances, wood, paper and clothing.
- Steel and materials ETFs spiked on the initial headline — VanEck Steel (SLX) rose 1.6% on the Monday after talks collapsed, and State Street Materials (XLB) hit an intraday all-time high, surpassing its February peak — before fading: XLX ended the week negative and SLX near flat.
- Both ETFs are still beating the S&P 500 year-to-date, with SLX up over 28% and XLB up over 18% as of Aug. 28, per Morningstar data.
- Moody's Atsi Sheth warned that the auto sector — where parts cross the border multiple times during production — has 'no winners,' while U.S. steel has only 'a little edge' because the domestic market is larger.
- University of Wyoming's Scott Beaulier flagged aluminum as the canary: the U.S. remains heavily import-dependent on Canadian primary aluminum, and smelters take years to build, so 'you can't tariff our dependence away overnight.'
- NEOS's Dan Luttner argued the border itself is a supply chain — Nucor runs electric arc furnaces on non-Canadian feedstock so it keeps the price umbrella, but Century Aluminum is still exposed because U.S. primary aluminum capacity is thin and feedstock still crosses the border; he also noted Freeport-McMoRan (6.5% of XLB) is a copper/critical-minerals story benefiting from the AI boom, not a steel trade.
- NAFTZ's Melissa Irmen said companies are already permanently restructuring supply chains in response to tariff uncertainty, telling members 'things will not go back to the way they were pre-2025.'
Why it matters: The Monday stock pop in Nucor, Cleveland-Cliffs and Century Aluminum was a reflex to a 50% tariff wall, not proof of durable gains — and the companies that actually control feedstock inside that wall (like Nucor's EAF mills) are a much smaller group than 'American metals companies' broadly, while cross-border supply chains in autos and aluminum mean tariffs compound every time metal re-crosses.
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