Three stocks now account for 20% of the S&P 500’s value. That’s making some investors nervous. by OverviewFX | Jun 7, 2024 | Stocks For the first time dating back to at least 2000, three U.S. stocks — Microsoft, Nvidia and Apple — account for more than 20% of the value of the S&P 500, Dow Jones Market Data show. Share it on social networks