[The three major U.S. stock indexes opened lower, Dow down 0.05%] According to Golden Finance, U.S. stocks opened with the three major indexes declining. The Dow fell 0.05%, the S&P 500 index dropped 0.23%, and the Nasdaq fell 0.4%. Microsoft (MSFT.O) dropped 2.8% after lowering AI software sales targets due to lukewarm customer response. Marvell Technology (MRVL.O) rose over 7% as the company announced it would acquire Celestial AI for up to $5.5 billion.