Costfoto / NurPhoto / Getty Images AMD shares soared Monday after the chipmaker announced a deal with OpenAI Key Takeaways The S&P 500 and Nasdaq climbed Monday afternoon as tech stocks gained, while a slide in shares of Verizon weighed on the Dow. A deal which could give OpenAI a 10% stake in Advanced Micro Devices sent shares of the chipmaker soaring. Verizon named former PayPal CEO Dan Schulman as its CEO, and shares of the telecom company dropped. Major U.S. equities indexes were mixed in rece ...