Plus: Traffic-safety regulators open an investigation into Tesla’s self-driving car system. And Delta’s positive outlook boosts airline stocks. Katherine Sullivan hosts.

Sign up for the WSJ's free What's News newsletter.

An artificial-intelligence tool assisted in the making of this episode by creating summaries that were based on Wall Street Journal reporting and reviewed and adapted by an editor.

Learn more about your ad choices. Visit megaphone.fm/adchoices