What Is Happening in the US Stock Market Today? S&P 500 TodayThe S&P 500 added 19.51 points, or 0.25%, to reach 7,747.46 and its yearly gain stood near 19.83%, according to the supplied market data. Micron was the standout S&P 500 gainer, while Lam Research and Applied Materials also posted strong advances. US Stock Market Today: Oil PricesOil remained a key risk for markets. FAQ’s: US Stock Market TodayDid the US stock market rise today?