S&P 500 briefly tops 5,500 for the first time as Nvidia market leadership continues: Live updates CNBCNvidia touches fresh record high, lifting both S&P 500 and Nasdaq MarketWatchStock Market Today: Dow, S&P Live Updates for June 20 BloombergUS stocks gain ground; Nvidia continues to push higher By Investing.com Investing.comS&P 500 Surpasses 5500 for First Time Intraday The Wall Street Journal