US President Donald Trump announced a hike in the temporary global tariff rate from 10% to 15%. The statement was posted Saturday on Truth Social, just one day after the Supreme Court limited the government’s authority to impose wide‑ranging tariffs under the International Emergency Economic Powers Act.

In a 6–3 vote, the Supreme Court ruled that the president cannot unilaterally impose tariffs on a global scale, reaffirming Congress’s primacy over trade policy. In response, Trump said he was raising the rate to a “legally vetted level of 15%,” accusing trade partners of “cheating” the US for years. The new tariffs take effect immediately and, under the law, can remain in place for up to 150 days, although experts expect new lawsuits.

Markets had reacted positively on Friday to the Supreme Court’s decision: retailer and apparel stocks rose on expectations of easing tariff pressure and cooling inflation. However, Trump’s statement on Saturday reintroduced uncertainty. Analysts warn that the White House is seeking alternative loopholes through Sections 122 and 301 of trade law.

The situation is further complicated by the question of refunding duties already paid, estimated at more than $175 billion, which could materially affect fiscal policy and market liquidity. Trade tensions remain a key macroeconomic risk for investors, who now have to monitor every step the administration takes to circumvent judicial bans.