The Power of Staying Invested
Many investors believe they can earn better returns by moving in and out of the market. But long-term market data tells a very different story. If you had invested $1 in the S&P 500 in 1990, that investment would have grown to around $40 today by simply staying invested.
This shows how powerful long-term investing can be, even after going through many market crashes and recoveries.
The Biggest Surprise in the Data
The numbers become even more interesting when you look at the market’s best and worst days. If you had stayed invested from 1990 until today but somehow missed only the 25 worst trading days over the last 35 years, your $40 would have become around $236. That is almost six times higher. On the other hand, if you missed only the 25 best trading days, your investment would have fallen from $40 to just $8. Missing a few great days can completely change your long-term returns.
Best Days and Worst Days Come Together
Many people think they can avoid the market’s worst days while still enjoying the best ones. In reality, this is almost impossible. History shows that the market’s biggest gains usually happen very close to its biggest losses. This happened during the 2000, 2008, 2011, 2020, and 2024–2025 periods.
After sharp falls, the market often recovers very quickly. Investors who stay out during these times may miss the strongest recovery days.
Why Market Timing Is So Difficult
Trying to guess when to sell and when to buy again sounds easy, but it rarely works in real life. Many investors think they will leave before the market falls and return before it rises. The problem is that nobody knows exactly when these big moves will happen. If you keep changing your strategy because of short-term fear or excitement, you increase the chances of missing the days that matter the most.
Stay Calm During Market Swings
Every long-term investor should expect a few very bad market days. Over a period of 35 years, there may be only a small number of extremely painful days, but those days are a normal part of investing. Around the same time, there can also be some of the strongest recovery days. Instead of reacting to every big move, it is often better to stay patient and stick with your long-term plan.
The Real Lesson for Investors
The biggest message from this data is simple: time in the market is usually more important than timing the market. Short-term ups and downs are a natural part of investing. Investors who remain patient and avoid making emotional decisions give themselves a much better chance of earning strong long-term returns. Staying invested through both good and bad days has often been one of the smartest ways to build wealth over time.
