Are You More Concentrated Than You Think When Your Funds Own the Same Stocks?

How can several holdings depend on the same company?

A fund holds investments on your behalf. If you own a stock directly and through two funds, all three positions contribute to your exposure to that company. Different account names, fund names, or investment managers don’t remove that connection. FINRA specifically recommends examining whether funds overlap with each other or with individual securities you own.[1]

This isn’t necessarily an oversight. Broad stock funds can share companies because their investment approaches cover some of the same market. You may also deliberately add a fund with a narrower focus. Research examining U.S. mutual funds during the global financial crisis found substantial overlap more often than random-allocation models would suggest.[2] That historical finding supports looking at holdings; it doesn’t establish how much your particular funds overlap today.

Start with the investments you already have, including workplace plans and accounts managed elsewhere. Ask your advisor to review them together and make clear which accounts are included in the portfolio total. Include a partner’s accounts only with their agreement and appropriate access. If an account is missing, identify the gap before describing the result as the household’s complete picture.

How much of your money is invested in the same company?

Multiply the amount invested in each fund by the percentage that fund holds in the company. Add those amounts to the value of any shares in that company you own directly. Then divide the combined amount by the total portfolio you’re reviewing. Use holdings information from reasonably comparable dates, and identify estimates or unavailable details.

The illustration below uses invented amounts and simple stock holdings. It assumes no additional exposure to the company elsewhere in the portfolio. It shows how ownership adds together, not how much concentration anyone should accept.

When does overlap deserve a change?

The example’s 6% is a measurement, not a recommended limit. A company that makes up a small share of your portfolio across several funds can have a different effect from one that dominates your portfolio. You don’t need to eliminate every repeated name to build a diversified portfolio. The SEC explains that diversification concerns the investments within funds as well as the mix of assets; a narrowly focused fund may offer less diversification than you expect.[3]

Also look beyond matching company names. Two funds can own different companies that respond to similar economic forces. Portfolio risk depends partly on how investments move in relation to one another, a relationship known as correlation.[4] Counting duplicate stocks therefore answers one useful question, but it doesn’t measure every risk or guarantee protection against a broad market decline.

Consider what the combined exposure could mean for your retirement. Would losses in your largest company exposures interfere with planned withdrawals or force you to postpone something important? Which expenses could you cover with other resources? Your advisor can compare scenarios using your actual needs, while keeping assumed losses clearly separate from forecasts.

What would a useful adjustment accomplish?

If the combined exposure fits your plan, keeping the holdings may be reasonable. If it’s larger than you intend, decide what the adjustment should accomplish before choosing which investment to change. You might reduce a direct position, replace a fund that repeats an exposure you already have, or direct future contributions elsewhere.

Rebalancing is the process of adjusting holdings toward your intended allocation as market movements or other changes shift the mix.[5] Redirecting new money can change the balance gradually, but it doesn’t remove the shares you already hold. Replacing one fund with another that owns similar companies may also leave the underlying exposure largely intact.

Consider the cost of the change. Selling appreciated investments in a taxable account can realize capital gains; the taxable gain depends on proceeds and adjusted basis, not the full amount sold.[6] Before making a change, ask your advisor and tax professional to weigh the proposed adjustment against its tax effects, trading costs, and any account restrictions.

Ask your advisor to explain clearly what you would own after any proposed change. The goal is to understand your portfolio’s combined exposures and how they fit the retirement decisions ahead. Review those exposures when holdings or circumstances change, rather than assuming that adding another fund automatically adds the diversification you need.

Related Reading: How Do You Measure Portfolio Risk in Dollars of Retirement Spending? connects portfolio losses with the spending decisions they could affect.