New York Times business news - July 10

The following are the top stories on the New York Times business pages. Reuters has not verified these stories and does not vouch for their accuracy.

- Linda Yaccarino, one of Elon Musk's top deputies as CEO of his X social media site, is exiting the company in a surprise move just months after the platform was acquired by the billionaire's AI startup, xAI.

- Microsoft said that it planned to give more than $4 billion in cash and technology services to train millions of people to use artificial intelligence, amid an intensifying Silicon Valley crusade to embed chatbots into classrooms.

- A top U.S. securities regulator known for her supportive stance on the cryptocurrency industry said that new models for trading securities known as "tokenization" must still meet regulations for other securities.

- U.S. President Donald Trump tapped Transportation Secretary Sean Duffy to serve as the interim administrator of NASA, a role that has remained vacant since Trump withdrew his initial nominee.