US equity indexes rose after President Donald Trump unveiled a counter to a Supreme Court ruling that struck down his import duties imposed under an emergency law, aiming to protect tariff revenue as customs duties, taxes, and fees almost tripled last year.

The Nasdaq Composite rose 0.7% to 22,851.1, with the S&P 500 up 0.6% to 6,902.2, and the Dow Jones Industrial Average 0.4% higher at 49,592.5 ahead of Friday's close.

The Supreme Court struck down the trade tariffs, stating that the International Emergency Economic Powers Act does not support such actions.

"We claim no special competence in matters of economics or foreign affairs," Chief Justice John Roberts said in the opinion of the court. "We claim only, as we must, the limited role assigned to us by Article III of the Constitution. Fulfilling that role, we hold that IEEPA does not authorize the President to impose tariffs."

The US Department of Homeland Security collected $287 billion in customs duties, taxes, and fees in 2025, up 192% from a year ago, according to data compiled by the US Treasury.

Trump said he will sign an order imposing a new 10% global tariff, under Section 122, which reportedly allows the president to impose tariffs for up to 150 days. "We are also initiating several Section 301 and other investigations to protect our country from unfair trading practices," Trump wrote in a social media post.