This S&P 500 stock has the highest return over the past 20 years—it’s not Apple or Tesla

Investors, stop us if you’ve heard this one before: Past performance is no guarantee of future results.

It’s a good mantra to keep in mind. Just because a particular investment has gone up in the recent past doesn’t mean it will continue to increase in value. And if one segment of the market has been outperforming the other, there is no guarantee that the trend will continue.