The uncomfortable fact about its historic run is that no one is sure why it’s happening—or what could bring it to an end.
Can anything stop the stock market? The U.S. economy recently weathered the worst pandemic in 100 years, the worst inflation in 40 years, and the highest interest rates in 20 years. Yet from 2019 through 2024, the S&P 500 grew by an average of nearly 20 percent a year, about double its historical average rate. Despite President Donald Trump’s erratic economic policies, which include the highest tariffs since the 19th century, the market is already up by about 8 percent in 2025.
