Impact of US Supreme Court Ruling on Tariffs

This technical report outlines the implications of the US Supreme Court's ruling on February 20, 2026, which invalidated the use of the International Emergency Economic Powers Act (IEEPA) for certain tariffs, significantly affecting US tariff revenue. The ruling specifically dismantles around USD60 billion in duties and additional tariffs imposed on China, Mexico, and Canada worth USD40 billion. While the overall US average tariff has decreased to approximately 5%, many tariffs remain in place under Section 301 and Section 232. The report details the potential economic ramifications, including increased trade uncertainty for companies, anticipated inventory management challenges, and the likelihood of a renewed stockpiling cycle. It also discusses the broader impact on global trade partners, particularly emerging markets, which may benefit from reduced tariffs. The report further examines the fiscal implications, including potential increases in the fiscal deficit and the effect on inflation rates, alongside the expected market responses to these changes.