S&P 500 Gains and Losses Today: AMD Stock Pops on OpenAI Deal; AppLovin Plunges

Key Takeaways A semiconductor stock logged the top performance in the benchmark index following the announcement of a collaboration with a major artificial intelligence player. Meanwhile, shares of an adtech darling plummeted following reports of a probe by federal regulators. The S&P 500 rose 0.4% and the Nasdaq climbed 0.7% to set fresh closing record Monday, boosted by broader tech gains, while the Dow slipped 0.1%. See here for more reporting from Investopedia on the first day of the trading week. Advan ...