These Were the 5 Worst-Performing Stocks in the S&P 500 in September 2025 -- and One's Decline Can Be Tied to President Trump

Key Points The stock market, and individual stocks, can be volatile over short periods. A bunch of these value-shedding stocks have posted disappointing quarterly results. Some fallen stocks can present great opportunities. 10 stocks we like better than CarMax › It's fun to follow stocks that soared recently, and it can be sobering to see which ones have plunged -- especially if you're a shareholder. So here's a look at the worst-performing stocks in the S&P 500 index of 500 of America's biggest ...