[Blockchain concept stocks strengthen Riot Platforms, MicroStrategy rose more than 3%] Golden Finance reported that the three major U.S. stock indexes collectively opened lower, with the Dow Jones Industrial Average falling 0.16%, the Nasdaq Composite Index falling 0.22%, and the S&P 500 Index falling 0.10%. Blockchain concept stocks strengthened, with Riot Platforms and MicroStrategy rising by more than 3%.