The S&P 500's expensive valuation could lead to a steep decline in stock prices, especially if tariffs become a material ...

U.S. stocks could fall sharply as high valuations collide with economic headwinds created by President Trump's tariffs.

Major indexes tumbled as traders digested recent trade war updates and as fresh AI fears percolated on Wall Street.

Wall Street expects another good year for the S&P 500 despite economic uncertainty created by President Trump's tariffs.