Nvidia alone accounts for more than a third of the S&P 500’s gains this year—and it’s a big risk for investors, top economist warns Yahoo FinanceAs Nvidia soars, the stock market’s deflated laggards spark concern MarketWatchI’m Not Saying Things Aren’t Crazy The Irrelevant InvestorHere’s Why The Economy Is Not As Strong As It Seems TheStreetSome Tech Stocks Are Having a Strong Year—but Not All of Them The Wall Street Journal