Wall Street sold off as investors worried about ever-rising U.S. debt levels. Treasury yields climbed, with the 10-year reaching 4.593%. The S&P closed -1.61%, the Nasdaq -1.41% and the Dow -1.91% or over 800 points. Key names included Tesla at -2.68%, Fair Isaac -15.74%, Nvidia -1.92% and Moderna -7.82%. Alphabet