The U.S. stock market is experiencing a significant midday sell-off on Friday, November 7, 2025, as investors grapple with persistent concerns over the stretched valuations of artificial intelligence (AI) stocks, the ongoing U.S. government shutdown, and recent weak labor market data. All three major indexes are firmly in negative territory, reflecting a broad "risk-off" sentiment dominating trading floors.Major Index Performance and Midday MomentumAs of midday, the market momentum is decidedly bearish, wit ...