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.

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.

A federal trade court knocked down President Donald Trump ’s sweeping “Liberation Day” tariffs late Wednesday and the administration immediately challenged the ruling in the U.S. Court of Appeals for the Federal Circuit. The U.S. Court of International Trade issued the decision, blocking all of Trump’s vast and sweeping tariffs.