Arabic version: صدام الرسوم يختبر سلاسل إمداد المعادن بين الولايات المتحدة وكندا

According to Cnbc, U.S. 50% tariffs on a wide range of Canadian goods have sparked a new trade conflict, while Canada plans $20 billion in retaliatory tariffs effective Sept. 8. Canada’s measures, ranging from 15% to 50%, cover more than 700 U.S. goods, including dairy, seafood, appliances, wood and paper products, and clothing.

Metals and materials shares initially rose after U.S.-Canada trade talks broke down. Nucor, Steel Dynamics, Cleveland-Cliffs and Century Aluminum gained on Monday, while the VanEck Steel ETF rose 1.6% and the Materials Select Sector SPDR reached an intraday record. The advance faded during the week: XLB finished negative and SLX was close to flat. As of Aug. 28, SLX was up more than 28% in 2026 and XLB more than 18%, both ahead of the S&P 500.

The tariff effects may be uneven because North American manufacturing supply chains are deeply connected. Moody’s Ratings chief credit officer Atsi Sheth said the auto sector is so integrated that tariffs affect both the targeted country and the country imposing them. Automotive exposure includes Canadian-sourced or single-sourced materials and components, from steel and stampings to powertrain parts, braking systems and electronics.

Economics professor Scott Beaulier said tariffs can create an immediate scarcity premium for domestic steel and aluminum producers, but durable beneficiaries need available domestic capacity, secure energy and raw-material inputs, and customers with few substitutes. He cautioned that the United States remains heavily dependent on aluminum imports and that building new smelting capacity takes years. Higher steel and aluminum prices can also raise costs for U.S. manufacturers, auto companies and construction.

Companies are already adjusting sourcing and supply-chain decisions, according to Melissa Irmen of the National Association of Foreign-Trade Zones. Supply-chain consultant Dan Luttner said the border functions as part of an integrated production system, with metals and components crossing repeatedly before entering finished goods. The resulting tariffs can compound with each crossing, leaving manufacturers to examine where parts move across the border more than once.