Most Trump tariffs are not legal, US appeals court rules

A U.S. appeals court has ruled that most of Donald Trump's tariffs, specifically those imposed under the International Emergency Economic Powers Act (IEEPA), are illegal, asserting the act does not explicitly grant tariff authority. This decision significantly undercuts a core component of the administration's economic policy and trade strategy, though the tariffs will remain active until October 14 to allow for a potential Supreme Court appeal. The ruling, alongside other legal challenges, sets the stage for an unprecedented Supreme Court review of the administration's broader economic agenda, introducing further uncertainty into trade policy.

Analysis

A U.S. appeals court ruling has declared that a significant portion of the Trump administration's tariffs, specifically those enacted under the International Emergency Economic Powers Act (IEEPA), are illegal. The 7-4 decision by the Federal Circuit court asserts that the IEEPA does not grant the president the authority to impose tariffs, a power the U.S. Constitution reserves for Congress. This ruling directly undermines a key tool of the administration's international economic and trade policy, which has been used to exert pressure on trading partners like China, Canada, and Mexico. While the tariffs remain in place until October 14 to allow for a potential appeal to the U.S. Supreme Court, the decision introduces substantial policy uncertainty. The market's immediate after-hours reaction was reportedly minimal, but as noted by B. Riley Wealth's chief market strategist, increased uncertainty on trade is a negative catalyst for corporate America. This legal challenge, coupled with a separate dispute over the Federal Reserve's independence, sets the stage for a significant showdown at the Supreme Court over the administration's entire economic agenda, with the outcome being a critical variable for future market conditions.

Key Decisions for Investors

• Investors should anticipate heightened volatility in trade-sensitive sectors, especially those with supply chains or revenue exposure to China, Canada, and Mexico, as the October 14 deadline for a Supreme Court appeal approaches.
• Closely monitor legal developments, as a decision by the Supreme Court to either hear the case or let the ruling stand will be a pivotal determinant for the future of U.S. tariff policy and its market impact.
• Consider reviewing and potentially hedging portfolio exposure to companies heavily reliant on imports or complex international supply chains, as the binary outcome of the legal battle could lead to sharp price movements.
• Recognize that this tariff ruling is part of a broader legal challenge to the administration's economic policies, suggesting an elevated level of political and regulatory risk that warrants a cautious investment posture until greater clarity emerges.