U.S. stocks opened lower, with the Dow Jones Industrial Average down 0.5%, the S&P 500 down 0.22%, and the Nasdaq Composite down 0.26%. Goldman Sachs (GS.N) opened down 3.08% after releasing its first-quarter earnings report; most major tech stocks declined, with Nvidia (NVDA.O) down 1.45% and Apple (AAPL.O) down 0.28%.