[The three major U.S. stock indexes open higher, blockchain concept stocks broadly rise] At the U.S. market open, the Dow Jones rose 0.6%, the S&P 500 index rose 0.9%, and the Nasdaq rose 1.4%. Most tech stocks increased, Nvidia (NVDA.O) rose 2%, AMD (AMD.O) rose 1.3%, and Micron Technology (MU.O) rose 2%. Precious metal miners declined, while blockchain concept stocks broadly rose.