Microsoft, OpenAI End Exclusivity Pact; United Airlines Talks Collapse; Verizon Surprises on Subscriber Growth

In a dramatic day for the stock market, Microsoft shares swung after the company and OpenAI agreed to dissolve their exclusive partnership, allowing OpenAI to shop its AI models to rival cloud providers like Amazon. Meanwhile, United Airlines sank after CEO Scott Kirby confirmed merger talks with American Airlines have ended. Verizon jumped after reporting a surprise gain in mobile subscribers, signaling a turnaround under new CEO Dan Schulman.