Jensen Huang, chief executive officer of Nvidia Corp., during the US-Saudi Investment Forum at the Kennedy Center in Washington, DC, US, on Wednesday, Nov. 19, 2025.Stefani Reynolds | Bloomberg | 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. No bubble, no trouble?2. Walmart's winSign at the entrance to a Walmart in Venice, Florida. Erik Mcgregor | Lightrocket | Getty Im ...