Contributed by: Timothy Wyman, CFP®, JD
As I was thinking about this topic, I revisited some excellent Morningstar research on portfolio diversification and investor behavior, which helped inspire a few of the ideas discussed below.
Have you ever noticed that the investments getting the most attention are almost always the ones investors wish they owned more of?
One year it's technology stocks. Another year it's artificial intelligence. Sometimes it's real estate, gold, international markets, or whatever happens to be leading the headlines. The temptation is understandable. When one area of the market is soaring, it can feel like the obvious place to invest.
The problem is that today's winners are rarely obvious in advance.
That's one of the reasons diversification remains one of the most important, and often most misunderstood, principles in investing. It won't always produce the highest return in any given year. In fact, there will be times when diversification feels frustrating because part of your portfolio is inevitably lagging behind. But over the long run, a thoughtfully diversified portfolio can help investors stay disciplined, manage risk, and improve the odds of achieving the goals that matter most.
One of the interesting things about investing is that some of the best decisions rarely feel like the most exciting ones.
Diversification is a perfect example.
Most people have heard the phrase, "Don't put all your eggs in one basket." While that's a good starting point, true diversification is about much more than simply owning a bunch of different investments.
In fact, it's possible to own several mutual funds or ETFs and still not be very diversified if they all behave similarly or own many of the same companies. Diversification isn't about the number of investments you own. It's about owning investments that respond differently to changing economic and market conditions.
Said another way, effective diversification is really about correlation. Assets don't need to rise and fall in opposite directions all the time, but they shouldn't all react exactly the same way to every market event. The greatest diversification benefits often come from owning investments with lower or even negative correlations, meaning some parts of the portfolio may hold their value or even appreciate when other areas are under pressure. Over time, that interaction can help smooth returns and reduce the impact of major market declines.
The challenge is that diversification can feel frustrating at times.
A properly diversified portfolio will almost always have something in it that isn't performing particularly well. When large technology stocks are surging, bonds may seem unnecessary. When U.S. stocks are leading the way, international investments may appear to be lagging behind. It's natural to wonder why we own certain positions when something else is grabbing all the headlines.
Ironically, that's often a sign that diversification is doing exactly what it's supposed to do.
One of the conversations we frequently have with clients is the difference between chasing the highest possible return and building a portfolio designed to help achieve their most important goals. Most families aren't investing to win a performance contest. They're investing to retire comfortably, support children and grandchildren, fund charitable causes, preserve their purchasing power, and create long-term financial security.
In nearly 30 years of working with families, I've rarely seen a financial plan fail because a client didn't own enough of the year's best-performing investment. More often, problems occur when investors take concentrated risks that don't work out as expected.
A portfolio that experiences fewer extreme outcomes may be more likely to help achieve those goals than one concentrated in a single asset class, sector, or investment theme. For example, a 50% loss requires a 100% return just to get back to your starting point. A 15% decline, on the other hand, requires only about a 17.6% gain to recover. This is one of the reasons we spend so much time managing downside risk. While investors naturally focus on returns, avoiding large losses can have an even greater impact on long-term wealth accumulation. Our objective isn't to eliminate volatility, which is impossible, but rather to help clients avoid the type of losses that can permanently derail a financial plan.
Recent years have provided plenty of reminders of why diversification matters. Different asset classes have taken turns leading the market. There have been periods when U.S. stocks dominated, periods when international markets outperformed, and periods when bonds, real estate, commodities, or gold provided meaningful benefits. The problem is that very few people consistently predict which asset class will be next in line.
Diversification acknowledges that reality. Instead of trying to guess the next winner, it recognizes that nobody knows with certainty what the next few years will bring.
Of course, diversification doesn't eliminate risk, and it certainly doesn't guarantee positive returns. Markets will always experience periods of volatility. However, diversification remains one of the most effective tools investors have for balancing growth opportunities with prudent risk management.
In the end, successful investing is rarely about finding the one investment that outperforms everything else. More often, it's about building a collection of investments that can work together through a variety of market environments.
The best portfolios are not always the ones that generate the highest return in any single year. More often, they're the ones that help investors stay disciplined, remain invested during difficult periods, and ultimately achieve the goals that matter most.
And that's really what diversification is all about.
Timothy Wyman, CFP®, JD, is the Managing Partner and CERTIFIED FINANCIAL PLANNER™ professional at Center for Financial Planning Inc.® Tim earned a place on Forbes’ Best-In-State Wealth Advisors List in Michigan¹ in 2026 for the ninth consecutive year.
Any opinions are those of the author and not necessarily those of Raymond James. There is no guarantee that these statements, opinions, or forecasts provided herein will prove to be correct. This material is being provided for information purposes only and is not a complete summary of all available data necessary for making an investment decision and is not a recommendation. Investing involves risk, and investors may incur a profit or a loss regardless of strategy selected. No investment strategy can guarantee your objectives will be met. Past performance may not be indicative of future results. Prior to making an investment decision, please consult with your financial advisor about your individual situation.