Authored by Matt Waters
Key Takeaways
- Diversification is often emotionally difficult because it asks you to reduce exposure to your biggest success. The investments that create wealth frequently become the hardest ones to trim.
- Behavioral biases can make concentration feel safer than it is. Recency bias, FOMO, and the fear of regret can cloud objective decision-making, especially after years of exceptional performance.
- Taxes shouldn’t be the only factor driving portfolio decisions. Avoiding capital gains taxes can sometimes lead investors to accept far greater market risk than they realize.
- The purpose of investing evolves over time. Building wealth often rewards concentration, while preserving wealth typically requires greater diversification, flexibility, and risk management.
Investment success has a funny way of making yesterday’s decisions feel obvious. When a concentrated investment has performed extraordinarily well, portfolio diversification can feel unnecessary or even irrational. That is often precisely when diversification matters most.
I see this “success bias” frequently with executives holding large positions in company stock, founders after years of business growth, or investors who accumulated significant wealth through a handful of exceptional winners. The position starts to become more than an investment, becoming part of the family’s financial identity.
And frankly, that attachment is understandable.
If someone built a $7 million position in Nvidia, Apple, or their own company stock over the last decade, diversification can feel almost irrational. The natural question becomes:
“Why would I reduce the very thing that created this wealth in the first place?”
This is where behavioral finance takes center stage.
Human beings are wired to extrapolate recent success indefinitely into the future. Recency bias is incredibly powerful, particularly among intelligent and successful people. Once an investment compounds dramatically over a long period of time, the brain subtly begins treating that outcome as evidence of permanence rather than possibility.
At the same time, concentrated winners create another psychological challenge: comparison.
If a diversified portfolio returns 9% while one concentrated position returns 28%, diversification suddenly feels intellectually weak, even if the diversified portfolio is objectively more prudent from a long-term wealth preservation standpoint.
That gap creates enormous FOMO for affluent investors.
Nobody enjoys watching a former position continue climbing after they trimmed it. In fact, some of the emotional discomfort surrounding diversification has very little to do with risk and almost everything to do with regret minimization. Investors want to avoid the feeling that they “sold too early.”
Taxes amplify the problem further.
A senior executive with several million dollars of low-basis company stock may intellectually understand the concentration risk while simultaneously feeling paralyzed by the embedded capital gains exposure. Over time, the tax liability itself starts feeling like the primary risk rather than the concentration.
Ironically, I’ve seen investors spend years trying to avoid a large tax bill only to experience a market decline that erased far more wealth than the taxes ever would have cost.
This is where the distinction between wealth creation and wealth preservation becomes critically important.
Concentration can create fortune. Diversification is usually what allows families to keep it.
That does not mean sophisticated investors should avoid concentrated positions entirely. Some degree of concentration is often unavoidable among entrepreneurs, executives, and highly successful professionals. In many cases, concentration is precisely what generated the wealth.
But eventually the objective changes.
At a certain level of financial success, the goal is no longer maximizing every possible dollar of upside. The goal becomes protecting flexibility, maintaining optionality, preserving lifestyle stability, and reducing the probability of catastrophic financial disruption.
Those are different objectives requiring different decision-making frameworks. And unfortunately, disciplined diversification rarely feels exciting in real time.
It often feels conservative.
Sometimes frustrating.
Occasionally even regretful.
But over long periods of time, resilience tends to compound more reliably than enthusiasm.
Frequently Asked Questions
Why does diversification feel like a mistake?
Diversification can feel disappointing because not every investment will outperform at the same time. When one holding is delivering exceptional returns, the other parts of a diversified portfolio naturally look less impressive by comparison. That’s exactly how diversification is designed to work. It reduces reliance on any single investment.
Aren’t concentrated positions how many people become wealthy?
Often, yes. Entrepreneurs, executives, and early investors frequently accumulate significant wealth through concentrated ownership in a business or a small number of investments. The challenge is recognizing when your financial objective shifts from creating wealth to preserving it.
What behavioral biases make diversification difficult?
Several psychological tendencies can make concentrated positions harder to manage, including:
- Recency bias: Assuming recent strong performance will continue indefinitely.
- FOMO (fear of missing out): Worrying you’ll miss future gains if you sell.
- Regret aversion: Avoiding decisions that could later feel like a mistake, even if they’re financially prudent.
Should taxes prevent me from diversifying my portfolio?
Taxes are an important consideration, but they shouldn’t be the only consideration. Many investors hesitate to diversify because of capital gains taxes, yet a significant market decline in a concentrated position can ultimately cost far more than the taxes they hoped to avoid. A financial professional can help evaluate strategies that balance tax efficiency with risk management.
When should an investor consider diversifying a concentrated position?
There’s no universal threshold, but diversification often becomes more important when a single investment represents a substantial portion of your net worth or your financial future depends heavily on one company, stock, or industry. The decision should reflect your goals, cash flow needs, tax situation, and overall financial plan.
Does diversification guarantee better investment returns?
No. Diversification is not intended to maximize returns or eliminate losses. Its purpose is to manage risk by reducing the impact any single investment can have on your portfolio, helping create a more resilient foundation for long-term financial goals.
Can I diversify without selling everything at once?
Absolutely. Many investors diversify gradually over time through systematic sales, charitable giving strategies, trusts, exchange funds (where appropriate), or tax-aware planning techniques. The right approach depends on your individual financial situation and objectives.
Advisory products and services offered by Investment Adviser Representatives through Prime Capital Investment Advisors, LLC (“PCIA”), a federally registered investment adviser. Tax planning and preparation services are offered through Prime Capital Tax Advisory. PCIA: 6201 College Blvd., Suite 150, Overland Park, KS 66211. PCIA doing business as Prime Capital Financial | Wealth | Retirement | Wellness | Family Office | Tax Advisory.
