Tax Strategy · 6 min read · 2026-03-02
The 9-step concentration unwind.
A concentrated stock position is the most common source of life-altering wealth gain — and the most common source of life-altering wealth loss.
50%+ of net worth in one stock is concentration risk most underestimate.
Single-stock positions can produce 90% drawdowns even in successful companies (Cisco, Intel, Boeing in their cycles). When the position represents 50%+ of household net worth, the concentration is existential. Selling outright triggers full tax. The screen identifies the alternatives.
The nine indicators
The nine moves to diversify concentration.
Each is a specific structural alternative to outright sale. The composite is a tax-aware path to lower concentration without crystallizing the full embedded gain.
Exchange fund — diversify without sale
Pattern: 7-year hold, $1M+ minimum
Exchange funds pool concentrated positions from multiple holders. Each holder receives diversified fund interests in exchange for their concentrated stock, deferring tax.
Covered call collar to protect downside
Pattern: long put + short call
Buying puts and selling calls creates a defined-range outcome. Caps upside but protects downside on the concentrated position.
Charitable remainder trust (CRT)
Pattern: 10–20% charitable lead
CRT receives the appreciated stock, sells without capital-gains tax, and pays an annuity stream to the donor. Remainder goes to charity.
Donor-advised fund contribution
Pattern: deduction at FMV
Contributing appreciated stock to a DAF deducts at FMV without realizing gain. Reduces concentration while delivering charitable intent over time.
10b5-1 systematic sale plan
Pattern: pre-set quarterly sales
Pre-set selling plan removes timing decisions and provides legal protection for executives. Disciplined approach to gradual concentration reduction.
Tax-loss harvesting in other positions
Pattern: offset realized gains
Realized losses elsewhere offset gains from concentrated-position sales. Coordination of harvest with sales reduces net tax.
Family limited partnership
Pattern: multi-generational planning
FLP can hold concentrated stock, distribute income, and shift future appreciation to next generation at reduced gift tax.
Borrowing against the position
Pattern: securities-based loan
Pledged-asset lending allows access to liquidity without selling. Margin against concentrated position requires careful management.
Variable prepaid forward
Pattern: institutional structure
VPF locks in a price floor on the concentrated position while preserving some upside, with deferred tax recognition. Complex; requires institutional broker.
Why concentration is the typical retail problem
Concentrated stock positions accumulate naturally for many wealth-builders. Tech employees at successful companies receive RSUs and ESPP shares that, with appreciation, can come to dominate household balance sheets. Founders of successful companies sometimes hold 70–95% of their wealth in their own stock. Inherited stock from a tax-successful estate can produce concentrated positions in the next generation.
The problem is that these positions, however acquired, share idiosyncratic risk. Even market-leading companies face existential threats — disruption, regulatory action, fraud, scandal. A single negative event can wipe out 30–80 percent of position value in days. Concentrated holders bear that risk in full.
Why outright sale is rarely optimal
Selling appreciated stock at long-term capital-gains rates triggers federal tax of 15–20 percent plus state tax of 0–13 percent plus the 3.8 percent Net Investment Income Tax for higher earners. The combined federal+state tax can reach 35 percent of the embedded gain. For substantial positions, the tax bill can be hundreds of thousands or millions of dollars.
The alternatives — exchange funds, collars, CRTs, gradual sale — all have tradeoffs but each defers or reduces the immediate tax friction. The discipline is to evaluate the alternatives rather than reflexively sell or reflexively hold.
The exchange-fund route
Exchange funds (Eaton Vance, Bernstein, others) pool concentrated positions from multiple high-net-worth holders. Each contributing holder receives interests in a diversified fund. The pooling defers the capital-gains recognition; the holder achieves diversification without selling.
Exchange funds typically require 7-year holding periods, $1M+ minimums, and qualifying real estate or partnership component (per IRC Section 721). The fees are meaningful (1.5–2.5% annual). For very large concentrated positions, the diversification benefit substantially outweighs the costs.
Charitable structures for charitably-inclined holders
Charitable remainder trusts allow appreciated stock to be donated, sold tax-free inside the trust, and produce an income stream to the donor for a term of years or for life. The remainder passes to charity. The structure provides current charitable deduction, eliminates capital-gains tax on the donated stock, and produces income — at the cost of the eventual gift to charity.
For holders with charitable intent, CRTs are often the highest-economic-value structure. The combination of tax savings, income, and gift fulfillment dominates outright sale on after-tax basis.
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Common questions
Questions.
When should I diversify?
When a single position exceeds approximately 25 percent of investable net worth, the concentration risk typically exceeds the diversification cost. The threshold is judgment, but 25 percent is a common rule of thumb.
Are exchange funds for everyone?
No — minimum investment is $1M and accredited-investor status required. For large concentrated positions, they are often the cleanest solution.
What about RSUs from current employer?
Sell RSUs as they vest to avoid concentration accumulation. Holding vested RSUs is identical to receiving cash and buying employer stock — most would not deliberately do that.
Can I 1031-exchange stock?
No, 1031 applies to real property only. There's no equivalent for securities.
How does the QSBS exclusion work?
Qualified Small Business Stock under Section 1202 can exclude up to $10M or 10x basis of capital gains. For founders meeting the requirements, this is a major exclusion.
Is options-based hedging affordable?
For positions $500K and up, options-based collars are cost-effective. Smaller positions face options-pricing inefficiencies.
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