Dow Jones Plunges 800 Points: AI Fears, Tariffs Trigger Market Sell-Off

• Dow Jones dropped 820 points (1.6%), S&P 500 and Nasdaq also fell over 1% each, with S&P 500 back in the red for 2026.
• IBM shares plummeted 13% due to Anthropic's blog post questioning IBM's AI-led business, marking its biggest single-day drop since October 2000.
• Software stocks like Microsoft (3% down) and CrowdStrike (10% down) continued to suffer, with AI concerns impacting various sectors from trucking to financial services.
• Unemployment fears surged after a Citrini Research paper suggested AI could lead to a 10% unemployment rate, impacting American Express and Mastercard shares.
• Donald Trump's defiant stance on tariffs, threatening 'higher duties' despite a Supreme Court rejection, added to market uncertainty and concerned EU officials.