Nvidia founder and CEO Jensen Huang reacts during a press conference at the Asia-Pacific Economic Cooperation (APEC) CEO Summit in Gyeongju on October 31, 2025. Jung Yeon-je | Afp | Getty ImagesThis is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox.Here are five key things investors need to know to start the trading day:1. Tech troublesAfter last week's losses and with Nvidia's can't-miss earnings report on the horizon, investors are wondering what's next for the a ...