What is a concentrated stock position and why does it matter?

A concentrated stock position is when a single stock makes up a large percentage of your total portfolio. Advisors may flag risk when one position exceeds 5%-20% of your portfolio. The concern is that your overall returns become dominated by one company's performance, removing the protection that diversification provides. If that company struggles, nothing else in your portfolio may be able to absorb the hit.

How does direct indexing help diversify a concentrated stock position?

Direct indexing lets you own individual stocks within an index rather than a fund, which creates opportunities for tax-loss harvesting. If you sell stocks that have declined to realize losses, you can then use those losses to offset capital gains as you gradually sell down your concentrated position. The strategy typically unfolds over five to 10 years, depositing cash alongside your stock while the account tracks a benchmark and generates offsetting losses.

Should I sell my concentrated stock position all at once?

Selling all at once can trigger a large capital gains tax bill and is rarely the right approach on its own. Spreading sales across several tax years helps keep more of the gain out of your highest tax bracket each year. You can also pair staged selling with tax-loss harvesting or other strategies to reduce the tax impact. A Mercer Advisors wealth advisor can help you build a diversified sale schedule tailored to your tax situation and goals.

Is an exchange fund worth the seven-year lockup?

An exchange fund can be worth the commitment if you have a low-cost-basis position, a high tax rate, and minimal liquidity needs. The fund lets you defer capital gains while achieving instant diversification across a basket of stocks. After seven years, you can redeem for a diversified portfolio while keeping your original cost basis. If you might need liquidity before the lockup ends, an exchange fund may not be the right fit.

How do I create a 10b5-1 trading plan for my concentrated stock?

A 10b5-1 trading plan is a prearranged, written plan that sets when and how you can sell company stock. Executives and long-tenured personnel use it to sell shares on a regular schedule while complying with insider trading rules. It may be beneficial to coordinate with your company's legal team and a Mercer Advisors wealth advisor. Your advisor can help structure the plan to align with your diversification timeline.

What is the difference between an exchange fund and a Section 351 exchange

Both strategies defer capital gains, but they differ in structure. An exchange fund is a private partnership where multiple investors pool appreciated stock, with a seven-year holding period before you can redeem for a diversified basket. A Section 351 exchange transfers stock into a newly formed corporation or exchange-traded fund (ETF), requiring a control group of five or fewer participants and diversification tests limiting any single issuer to 25% and the top five to 50%.

Which is better for diversifying concentrated stock: direct indexing or an options collar?

They serve different purposes. Direct indexing can gradually reduce your position over years by generating tax losses to offset gains, making it ideal for patient investors who want to manage taxes over time. An options collar provides immediate downside protection by hedging the position without selling shares, but it caps your upside. It’s possible to combine them: direct indexing for multiyear diversification that manages taxes and a collar for near-term protection.

Concentrated Stock Diversification Strategies

Introduction

A concentrated stock position can be both a sign of success and a source of risk. Whether your position grew from years of equity awards, a successful IPO, or a long-held investment that appreciated significantly, having too much of your net worth tied to a single stock introduces volatility and uncertainty. Concentrated stock diversification offers multiple paths to help reduce that risk while managing taxes.

One challenge is that, while reducing risk is practical, selling triggers capital gains tax that can take a significant bite out of your wealth. The good news is that you have more options than a sell-and-pay-taxes approach.

This guide walks through nine established concentrated stock diversification strategies, how they compare, and how to identify the right combination for your situation.

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The Concentrated Stock Diversification Guide: 9 Strategies Compared

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The Concentrated Stock Diversification Guide: 9 Strategies Compared

Introduction

Further Learning

How does the Magnificent 7 compare to the rest of the S&P 500?

Is it better to hold individual stocks or a diversified portfolio?

How do I reduce a concentrated stock position without triggering a large tax bill?

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