The Stock Market Sounds an Alarm as Investors Get Bad News About President Trump's Economy. History Says This Will Happen Next. - The Motley Fool

The U.S. stock market has stumbled in 2026. The benchmark S&P 500 (^GSPC 0.28%) has fallen more than 3% even though most companies reported better-than-expected earnings in the fourth quarter. Investors are worried about valuations, especially among artificial intelligence stocks. In fact, the S&P 500 sounded an alarm in February: A popular valuation metric reached its highest level since the dot-com crash. Meanwhile, uncertainty surrounding President Trump's tax and trade policies has added to the sense of disquiet. While the administration has relentlessly promoted tariffs as a path to great

The U.S. stock market has stumbled in 2026. The benchmark S&P 500 (^GSPC 0.28%) has fallen more than 3% even though most companies reported better-than-expected earnings in the fourth quarter. Investors are worried about valuations, especially among artificial intelligence stocks. In fact, the S&P 500 sounded an alarm in February: A popular valuation metric reached its highest level since the dot-com crash. Meanwhile, uncertainty surrounding President Trump's tax and trade policies has added to the sense of disquiet. While the administration has relentlessly promoted tariffs as a path to great