U.S. stock markets faced a significant sell-off this week, primarily driven by rising oil prices, which surpassed $100 per barrel, and persistent worries about artificial intelligence spending. Major indexes including the Dow Jones, S&P 500, and Nasdaq all closed lower, with tech giants like Tesla and Alphabet seeing substantial stock declines following disappointing earnings reports. Investors are now focused on geopolitical tensions in the Middle East and the implications of new tariffs announced by the Trump administration. The situation has left the market jittery, with fears of a deeper downturn as analysts assess the balance of oil prices and AI investments in the coming weeks.