ChatGPT maker OpenAI said Sam Altman will return as CEO and Nvidia reported big jumps in earnings and revenue on the back of strong data center sales. Here’s what investors need to know today.

1. ChatGPT Maker OpenAI Brings Back Sam Altman as CEO 

OpenAI said it would bring back Sam Altman as CEO, less than a week after the board dismissed him and he was hired by Microsoft. The announcement included the addition of new board members at OpenAI. Microsoft CEO Satya Nadella said he would support the changes to the governance structure at the Microsoft-backed startup, and shares of Microsoft (MSFT) edged 0.6% higher in pre-market trading.