Welcome to the $4 Trillion Market Cap Club, Microsoft! Are There More Gains for MSFT Stock in Store?

Microsoft (MSFT) became the second U.S. company to join the exclusive $4 trillion market cap club on Tuesday, riding a 4% surge after restructuring its OpenAI partnership. The software giant now values its stake in the AI startup at roughly $135 billion, representing about 27% ownership on a fully diluted basis. The milestone comes as Microsoft and Apple (AAPL) raced toward the $4 trillion threshold, with Apple needing to close above $269.54 to claim its spot. Nvidia (NVDA) reached this valuation for the ...