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Owning a large, highly appreciated position in a single stock is one of the most enviable problems in personal finance and one of the most misunderstood. Whether you accumulated shares of NVIDIA, Apple, Google, Microsoft, SpaceX, or a lesser-known company, and watched them grow into a life-changing sum, the challenge is the same: what do you do now? The very success that created this wealth also created an intricate web of tax exposure, concentration risk, and psychological pressure that, if handled poorly, can erode the fortune you worked so hard to build.

The Tax Trap: Capital Gains and the Cost of Success

The most immediate obstacle for holders of appreciated stock is the tax bill that comes with selling. Long-term capital gains tax rates at the federal level can reach 20%, and high-income earners face an additional 3.8% Net Investment Income Tax (NIIT). Add state income taxes, California, for example, taxes capital gains as ordinary income at rates up to 13.3%, and a shareholder could surrender 37% or more of every dollar of gain realized.¹

This creates a painful paradox: the rational desire to diversify is directly punished by the tax code. Many investors simply avoid selling, hoping to defer the tax indefinitely, sometimes to the point where the position’s risk becomes existential to their financial plan. 

Concentration Risk: The Other Side of the Equation

Every dollar left in a single stock is a dollar not diversified. While NVIDIA, for example, has delivered extraordinary returns, even the most celebrated companies in history have suffered severe drawdowns, and some never recovered. For investors whose net worth is concentrated in one position, this is not an abstract concern; it is an existential one. Diversification is not simply about capturing broader market returns; it is about protecting against the irreversible destruction of wealth that can follow from a single company’s misfortune.

Sudden Wealth Syndrome: The Psychological Dimension

Beyond taxes and risk, there is a profoundly human dimension to sudden or outsized wealth that financial plans often fail to address: the psychological phenomenon known as Sudden Wealth Syndrome. This term describes the disorientation, anxiety, guilt, and decision-making paralysis that can accompany a dramatic and rapid increase in net worth. 

To help you begin your journey in finding a solution to some of these issues, you can take a quick 15-question quiz, “Concentrated Stock Solutions Questionnaire” here: https://www.worthpointeinvest.com/concentrated-stock-questionnaire/

1 Federal long-term capital gains rate (20%) and Net Investment Income Tax (3.8%) per IRS Revenue Procedure 2025-32 and IRC Section 1411, as reported by TS CPA, “2026 Capital Gains Tax Rates, Brackets & NIIT” (tscpatax.com). California top capital gains rate (13.3%, taxed as ordinary income) and combined federal/state rate of approximately 37% per Define Financial, “California Capital Gains Tax: A Comprehensive Guide” (definefinancial.com) and CalcLeap, “California Capital Gains Tax Calculator 2026” (calcleap.com). Rates and thresholds are subject to change; consult a tax professional for current figures applicable to your situation.

Morgan is a wealth management fiduciary professional with 20 years of experience and works with individuals, families, and trusts to help optimize concentrated stock solutions.

Morgan H Smith Jr. is an investment advisor with WorthPointe, LLC, a registered investment adviser in San Diego, Calif. WorthPointe is registered with the Securities and Exchange Commission (SEC). Registration of an investment advisor does not imply any specific level of skill or training and does not constitute an endorsement of the firm by the commission. WorthPointe only transacts business in states in which the firm is properly registered or is excluded or exempted from registration. A copy of WorthPointe’s current written disclosure brochure filed with the SEC, which discusses among other things, WorthPointe’s business practices, services, and fees, is available through the SEC’s website at https://adviserinfo.sec.gov/firm/summary/143996.

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