Wall Street Grapples with AI Valuation Concerns as Indexes Extend Losses

U.S. stock markets continued their downward trend on Tuesday, November 18, 2025, extending losses for a second consecutive session as investors grappled with concerns over elevated valuations in the artificial intelligence (AI) sector and the lingering uncertainty surrounding future Federal Reserve interest rate policy. All three major indexes were in negative territory during afternoon trading, reflecting a cautious sentiment that has taken hold of Wall Street.Market Indexes PerformanceAs of afternoon trad ...