U.S.-Canada trade war sparks metals stocks rally, but supply chain complexities cloud long-term gains.

The U.S. imposed 50% tariffs on $20 billion of Canadian imports, prompting Canada to retaliate with similar tariffs on U.S. goods. This trade war initially boosted metals stocks like steel and aluminum, benefiting companies such as Nucor and Steel Dynamics. However, the rally faded as experts highlighted the complex, integrated supply chains between the two countries, especially in the auto sector, which dilute the benefits of tariffs. Companies are adjusting supply chains to manage uncertainty, but long-term impacts remain unclear as tariffs increase costs for manufacturers on both sides of the border.