Supreme Court Strikes Down Trump Tariffs, Recent Levies Loom

The U.S. Supreme Court has dealt a significant blow to former President Donald Trump’s trade policy, striking down his sweeping tariffs imposed under the International Emergency Economic Powers Act (IEEPA). The 6-3 ruling, handed down on February 20, 2026, has sparked a swift response from Trump, who has vowed to implement new tariffs through alternative legal avenues. The decision throws U.S. Trade policy into a state of uncertainty, though initial market reactions have been positive.

Supreme Court Ruling: A Setback for Trump’s Tariff Agenda

The Supreme Court determined that President Trump exceeded his authority when unilaterally imposing broad tariffs, ruling that IEEPA does not provide the necessary congressional authorization for such actions. Chief Justice John Roberts, writing for the majority, emphasized that the president’s power to impose tariffs is not unlimited and requires clear congressional backing. AP News reports that the ruling maintains decisions from lower courts.

Notably, Justices Neil Gorsuch and Amy Coney Barrett, both appointed by Trump, joined the majority in striking down the tariffs. Justices Clarence Thomas, Samuel Alito, and Brett Kavanaugh dissented.

Trump’s Response: New Tariffs on the Horizon

Following the Supreme Court’s decision, President Trump expressed his disappointment and announced plans to impose a new 10% global tariff under Section 122 of the Trade Act of 1974. USA TODAY reports that this new tariff is scheduled to take effect on February 24th. Trump also indicated he would initiate tariff investigations under Section 301 of the Trade Act, potentially targeting major trading partners, including Korea. The Independent details Trump’s criticism of the justices who ruled against him, calling the decision “incorrect” and expressing shame.

Market Reaction and Economic Impact

The U.S. Stock market reacted positively to the Supreme Court’s ruling, with the three major indices closing higher on February 20th. Analysts at CNN NBC News suggest that the ruling alleviated concerns about inflation and reduced potential costs for companies.

Impact on the Korean Stock Market

The KOSPI index is being closely watched as it approaches the 6,000 mark. Financial investment firms, such as NH Investment & Securities, predict a range of 5,500 to 5,800 for the index this week (February 23rd to 27th). The Supreme Court’s tariff ruling is considered a variable that could significantly impact the domestic stock market. The performance announcement of NVIDIA, a leading AI company, and potential passage of the 3rd amendment to the Commercial Act are also key factors influencing the KOSPI.

Looking Ahead

The coming weeks will be crucial in determining the long-term effects of the Supreme Court’s decision and the implementation of Trump’s new tariff plans. The market will be closely monitoring NVIDIA’s earnings report and the progress of the 3rd amendment to the Commercial Act in the National Assembly. The potential for broader trade conflicts remains a significant concern as Trump explores alternative avenues for imposing tariffs.