Stock indexes surged early on Thursday after the U.S. Court of International Trade unanimously ruled that Trump didn’t have the authority to impose the sweeping tariffs.

Most of President Trump’s tariffs were halted late Wednesday by a U.S. trade court in a sharp rebuke of the president’s signature trade war policy.

The U.S. Court of International Trade on Wednesday struck down tariffs imposed on virtually every country by President Donald Trump, ruling that he exceeded the authority granted to him under the 1977 International Emergency Economic Powers Act.