The U.S. stock market fell following another jarring day on Tuesday, as worries keep dogging Nvidia, bitcoin and other Wall Street stars that their prices shot too high.After quickly sliding to a morning loss of 1.5%, the S&P 500 clawed back nearly all of it before sinking again. It finished with a fall of 0.8% and pulled further from its all-time high set late last month. The Dow Jones Industrial Average lost 498 points, or 1.1%, and the Nasdaq composite sank 1.2%.Nvidia was again the heaviest weight on th ...