[U.S. Stock Market's Three Major Indexes Open Lower, Cloudflare Drops 6%] At the opening of the U.S. stock market, the three major indexes collectively opened lower. The Dow Jones Industrial Average fell 0.74%, the Nasdaq Composite Index fell 0.63%, and the S&P 500 Index fell 0.5%. Tech stocks generally declined, with Amazon and Microsoft both dropping more than 2%. Cloudflare fell 6% due to partial network service outages.