AI-centered US stock bull market nears four-year anniversary

The U.S. bull market, driven by an AI spending engine, is nearing its four-year anniversary on October 12. The S&P 500 is trading at record levels, signaling the start of the latest bull run. Corporate profits have surged, fueled by AI expansion and a robust economic backdrop, contributing to investor optimism. However, the market faces risks from Federal Reserve interest rate hikes and rising U.S. Treasury yields.

The AI theme underpins the bull market, with tech companies like Nvidia leading the growth. While the current bull market ranks as the eighth-longest in history, analysts caution that it could end due to "disease" rather than age.