618-288-9505 info@carsonallaria.com

The Right Way to Diversify Your Investment Portfolio

by | Aug 25, 2025

Diversification is more than simply spreading money across multiple funds or advisors. True diversification requires looking deeper into the underlying investments to avoid overlap and concentration risks. By understanding how different strategies work together, investors can build portfolios that are more resilient and consistent over time.

Retirement Planning, Investing
The old adage, “Don’t put all of your eggs in one basket” has undoubtedly been a simple yet profound guide for investors for decades. The translation is simple; diversify your portfolio so that if unforeseen circumstances negatively affect one of your stocks, it won’t completely derail your entire portfolio. Of course, while the proud and perhaps stubborn in nature may think that those catastrophic events can be sniffed out by a trained and sharp investor, the truth is that even the most intelligent financial minds have missed some of the stock market’s biggest surprise blunders.

Diversifying Your Portfolio

With that said, what is the solution? One of the first answers that comes to mind is diversification. By buying multiple stocks, varying in different industry sectors of the market, geographic regions, market capitalization size, etc., one can reduce what is known as unsystematic risk, or risk that can be diversified against. This basic principle of investing is often easy for investors to understand, yet when trying to execute proper implementation, they fall short. Here are some ways investors think they are diversifying their portfolio, but instead are causing increased overlap and decreased diversification.

Diversifying by Choosing Different Mutual Funds

At first glance, what’s wrong with picking multiple mutual funds? If done properly, absolutely nothing. A mutual fund is a bundle of thousands of stocks and can provide increased benefits of diversification for investors in exchange for annual internal expense fees. Some mutual funds represent certain asset classes only (i.e. large cap, small cap, emerging markets, etc.) and have more strict guidelines on what the fund can invest in. This causes the fund to stay true to the nature of the fund at all times. This is important for investors who are trying to maintain a consistent allocation strategy and helps ensure that there is no style drift or allocation drift due to changes made within the fund. With these funds, what you see is what you get, and you don’t expect for the fund management team to significantly increase the level of cash in the fund or shift to a different asset class to produce greater returns. However, other mutual funds utilize a balanced or general allocation approach, meaning there is much greater flexibility within the fund to invest in large cap stocks, small cap stocks, international stocks, and even bonds, all in the same fund. These funds aren’t bad for investors, but they do make it more difficult to keep a consistent allocation at any given time. And, what investors will sometimes do is choose multiple funds with this strategy thinking it will result in greater diversification. But, choosing multiple funds with similar strategies may not be adding much diversification, but it would be adding more trading costs.

 Diversifying by Fund Family

Other times, investors may be torn between two funds from different fund families. Both may have decent track records and similar expenses. However, if both funds represent the same asset class (i.e. small cap) then the investor could be overly concentrated in that asset class by investing in both funds. In other words, just because you are invested in two mutual funds, or six mutual funds, or twelve mutual funds, doesn’t mean you are properly diversified.

 Diversifying by Advisor

A common strategy utilized by wealthy families is to hire multiple financial advisors to manage portions of the family’s portfolio. The rationale is that by having multiple advisors with different investment philosophies, the result will be proper diversification. This is also not necessarily true. If both advisors utilize individual stock strategies, one may be buying a stock while the other is selling. And, each advisor also may not be aware of what the other is investing in, which may cause increased overlap and concentration to certain stocks, sectors of the market, or even to cash. So, while multiple advisors can help increase diversification and bring different investment niches into the mix, it doesn’t necessarily guarantee more diversification.

Successful Diversification

True diversification is the result of actually focusing on the underlying investments in the portfolio. Those investments should ultimately represent companies of different size, location, industry, etc. When investing in bonds, you can diversify by credit quality, duration, average maturity, etc. The result won’t always mean a higher rate of return. It’s possible that someone could be over-concentrated in large-cap growth stocks, and the large-cap growth sector could be the best-performing sector. But, proper diversification should produce a more consistent investment experience, which is extremely important when you’re planning for retirement and wanting to preserve your life-savings. In summary, despite the many pitfalls of diversification, it can be done. And, all these methods, when used properly, can lead to increased diversification. But, just simply choosing different mutual funds, different fund families, or different advisors won’t guarantee proper diversification.

Want more help? Let’s chat.

Joe Allaria, CFP®

Joe Allaria, CFP®

Wealth Advisor | Partner

Follow me on Social Media

Free Retirement Assessment

Our free assessment will show you how to invest confidently, reduce taxes, and retire successfully. We want you to know exactly how we can help before you pay us a single dollar.
Recent Blogs

How to Get on Track for Retirement

Nearly 30% of Americans have nothing saved for retirement—and even more...

Estate Planning in Illinois: Everything You Need to Know

Estate planning isn’t just for the wealthy—it’s essential for anyone who...

How Tariffs Could Impact Your Investments, Retirement, and Everyday Expenses

Tariffs can create market volatility and raise household costs, but a...
Get All Insights