U.S. stock market plunge on March 4, 2025, as Trump’s tariffs on Canada, Mexico, and China triggered investor panic. The Dow Jones fell 800 points, while the S&P 500 and Nasdaq dropped by 2%. Key sectors like automobiles, retail, and tech suffered heavy losses. Global markets also reacted, with China’s Shanghai Composite falling 3.8%. Experts warn of higher prices and economic slowdown if tensions escalate. Investors shifted to safe-haven assets like gold. The future depends on whether a trade resolution can be reached or if a Trump-led recession looms.