US stocks today: S&P 500 and Nasdaq notch records; AMD results spark AI stock rally The S&P 500 and Nasdaq hit record highs Wednesday, fueled by Middle East conflict resolution hopes and strong AMD earnings boosting AI stocks. Global stocks surged as oil prices dropped, with S&P 500 companies showing robust profit growth driven by AI advancements. The economy shows stability, with strong private payrolls and positive outlooks from companies like Disney and Uber.