The U.S. Dollar declined sharply in trading Friday following a Supreme Court ruling that invalidated some of the tariffs imposed by the Trump administration, prompting uncertainty about the future of trade policy and the Federal Reserve’s response. The dollar’s initial gains, fueled by robust economic data and a hawkish Federal Reserve stance, were erased after the 6-3 decision struck down tariffs enacted under a 1977 national emergency law.
The Court, in an opinion authored by Chief Justice John Roberts, upheld a lower court’s finding that President Trump had exceeded his authority in utilizing the law to justify the tariffs. The ruling immediately triggered a response from the White House, with former President Trump announcing plans to impose a 10% global tariff under Section 122 of the 1974 Trade Act and initiate further investigations. Treasury Secretary Scott Bessent indicated that the combined use of Section 122, alongside potentially enhanced Section 232 and Section 301 tariffs, would likely maintain tariff revenue at roughly the same level as in 2026.
The initial market reaction saw the dollar reverse course, as investors reassessed the implications of the shifting trade landscape. According to analysts, the economic data released earlier in the day – a higher-than-anticipated inflation reading coupled with a significantly lower-than-expected GDP growth rate of 1.4% – created a complex backdrop. The GDP figure was partially attributed to the impact of a prior government shutdown, but the conflicting signals added to market volatility.
The Supreme Court’s decision arrives as the Federal Reserve has been grappling with the economic effects of existing tariffs. A recent New York Fed study highlighted that, as of November 2025, approximately 90% of the economic burden of the tariffs had fallen on U.S. Firms, and consumers. This finding underscores the complexities of tariffs, which, while intended to protect domestic industries, often result in increased costs for businesses and individuals.
Economists note that a unilateral imposition of tariffs by the U.S. Typically leads to an appreciation of the dollar. This occurs because tariffs reduce demand for imports, lessening the need for foreign currency while maintaining demand for U.S. Dollars. While a stronger dollar can offset some of the cost of tariffs for consumers – potentially between 30-50% – it simultaneously makes U.S. Exports more expensive, negatively impacting foreign demand for American goods. The Yale Budget Lab has detailed these dynamics, explaining that the ultimate impact on prices depends on factors like the dollar’s appreciation and the Federal Reserve’s response.
The ruling too raises questions about the independence of the Federal Reserve, as the White House’s response to the Court’s decision could put pressure on monetary policy. The interplay between tariff policy and the Fed’s actions is particularly sensitive given the ongoing efforts to manage inflation and maintain economic stability. The potential for further tariff actions, as signaled by the former President and Treasury Secretary Bessent, leaves the future direction of trade policy – and its impact on the dollar and the Fed – uncertain.
