The criticism from the hedge fund billionaire and Trump voter is a rare rebuke of the president by a corporate leader.

© Jeenah Moon for The New York Times

Software companies that audit expense reports are adding a new arsenal of capabilities to try to detect receipts that have been created using A.I. chatbots.

© The New York Times

Tesla’s C.E.O. could become the world’s first trillionaire — if he can get the carmaker to hit some lofty performance hurdles.

© Amir Hamja/The New York Times

The Trump administration’s unorthodox Chinese export pact with Nvidia and Advanced Micro Devices is worrying trade experts.

President Trump again delayed higher tariffs on Chinese goods. But his recent moves on computer chips have stoked fears he’s willing to give too much to reach an accord.

A deal for Nvidia and AMD to give the Trump administration a cut of chip sales to China raises questions about national security and trade policy goals.

The president’s trade war entered a new phase on Thursday with hefty levies on scores of countries taking effect, adding further uncertainty.

Futures contracts hit a record price after the president announced plans for a 50 percent tariff on the metal, driving up costs for businesses.