Nvidia did not warn at least some major customers in advance about new U.S. export rules it was told about a week ago requiring it to obtain licenses to sell its China-focused artificial intelligence chip,

The restrictions are the first major limits the Trump administration has put on semiconductor sales outside the United States, toughening rules created by the Biden administration.

Over the last trading session, markets reacted negatively to the news that Nvidia would need a new license to export H20 chips — originally engineered to skirt