Concentration Risk

Concentration risk is the risk that your finances lean heavily on one business, industry or place, so a single setback hits several parts of your wealth at once.

Why concentration risk matters to your portfolio

A bad year at work can arrive alongside a fall in investments tied to the same industry. A local downturn can hit your property and your business interests together. Looking at each asset on its own hides those links until you need income or cash.

An interviewee who runs his own company and co-invests across many small businesses describes business owners he knows whose largest asset is the company they run. A bad year there can hit much of their net worth.

So look at what your holdings depend on underneath their labels. Your job and your property belong in the same picture as your private investments, because together they decide how a setback would land on you.

Our guide to private investment concentration works through that picture. The broader private market portfolio map places private holdings next to the purposes your money has to serve.

How concentration risk is assessed

List your job, your property and your private holdings. For each, write down the business, industry or location its value or income depends on. Then look for shared dependencies instead of relying on account names or investment categories.

Example: your income comes from a local construction business, you own property in the same area, and you hold private investments tied to regional development. Three labels, one bet: a local building slowdown could cut your income, your property demand and your investment prospects together.

Record that shared dependency and ask the next question: how would you meet your needs if all three weakened at once? The exercise doesn't give you a numerical limit, and another investment won't automatically fix it.

Mark unknown exposures as unknown. A fund label may not tell you enough about the underlying businesses or locations to judge overlap. Missing information is a reason to ask, not evidence that the holdings are independent.

Common mistakes when mapping exposure

Counting holdings without asking what drives them makes a portfolio look more varied than it is. Separate accounts can still depend on the same economic conditions. Knowing an industry well makes overlapping exposure feel comfortable; it doesn't shrink the downside.

Leaving your job out may miss a major dependency. Leaving property out can hide a geographic link. Include both even though neither shows up in an investment account.

Mapping dependencies describes risk. It doesn't remove uncertainty, and assets that look unrelated can still fall together under stress.

Related terms

Due diligence investigates what sits underneath a holding. An investment policy statement records how you'll judge those exposures against your purposes and limits.

Source notes

The interviewee's remarks are paraphrased; the example is our own.