[U.S. stock market's three major indexes mixed, Super Micro Computer drops over 5%] According to Golden Finance, U.S. stocks opened with the Dow Jones Industrial Average up 0.03%, the S&P 500 Index down 0.03%, and the Nasdaq Composite Index up 0.04%. Super Micro Computer (SMCI.O) fell over 5% after earnings, with Q1 fiscal revenue dropping significantly by 15%, missing expectations. AMD (AMD.O) dropped about 2.7%; although Q3 earnings exceeded expectations, the guidance failed to impress investors. Rivian (RIVN.O) rose over 6%, with Q3 earnings surpassing expectations and maintaining its full-year forecast.