Exchange Funds (Swap Funds): How Concentrated Holders Defer Gains Without a Sale
Exchange funds let holders of low-basis concentrated stock swap into a diversified pool without triggering capital gains. The catch: a seven-year lockup and qualifying-asset rules.
A senior engineer at a public tech company holds $6.4 million of employer stock acquired through a decade of RSU vesting. Basis sits at $1.1 million. Selling to diversify triggers $5.3 million of long-term gain, which at a 23.8% federal rate plus California’s 13.3% produces a tax bill north of $1.9 million. The stock is 71% of her liquid net worth, and she wants it to stop being that.
An exchange fund solves the diversification problem without the tax bill. She contributes the employer shares in kind to a partnership that pools concentrated positions from many contributors, receives partnership interests worth roughly the same amount, and now holds a proportional stake in a diversified basket. No sale, no gain, no tax. Basis carries over.
The cost is a seven-year lockup, a 25% real-asset requirement inside the fund, and management fees typically 0.85% to 1.5% per year. Done at the right time for the right holder, the math is still compelling.
The mechanics under IRC Section 721
Exchange funds operate as limited partnerships under IRC §721, which says no gain or loss is recognized when a partner contributes property to a partnership in exchange for a partnership interest. The exchange fund is the partnership. The concentrated holders are the contributing partners. Each holder contributes shares, the partnership accepts them, and each holder receives a partnership interest with basis equal to the basis of the contributed stock.
The partnership now holds a diversified pool: maybe 50 or 80 different public stocks, each contributed by different concentrated holders. Every partner owns a proportional piece of the whole pool.
For IRC §721 to apply cleanly, the partnership must not be treated as an investment company under IRC §721(b). That rule would cause gain recognition on contribution if more than 80% of the partnership’s assets were readily marketable securities. Exchange funds avoid the investment company rule by holding at least 20% (in practice, 25% for cushion) in qualifying non-marketable assets: real estate partnerships, mortgages, or similar illiquid investments.
That 25% drag is the structural cost. An equity holder who exchanges into the fund is trading a concentrated equity position for a diluted version: roughly 75% diversified equities, 25% real assets and similar. The expected return is lower than a pure equity pool. Whether that gap is worth paying depends on the holder’s tax bracket and alternatives.
Who qualifies to contribute
Exchange funds are almost universally open only to qualified purchasers, defined in the Investment Company Act as individuals with at least $5 million of investments. The minimum stake contributed to most funds is $500,000 to $1 million of eligible stock, and some funds require $5 million minimums.
The fund also screens which stocks it will accept. Because the fund is trying to build a diversified portfolio, it can only accept contributions that improve diversification. If the fund is already overweight in semiconductor stocks and a prospective partner wants to contribute another semiconductor position, the fund may decline or accept only a partial amount.
This creates scheduling risk. A holder who wants to contribute $3 million of employer stock may find the current quarterly fund is only accepting $1 million of their stock. Large funds (Eaton Vance/Morgan Stanley, Goldman Sachs) run multiple funds per year; smaller sponsors may run one fund per quarter.
The seven-year lockup
IRC §731 would normally allow a partner to withdraw from a partnership and receive cash without gain. Exchange funds use a key workaround: the partnership agreement restricts withdrawal for seven years. A partner who withdraws early receives back a share of the original contributed stock, not a proportional slice of the diversified pool. That defeats the purpose of the exchange.
After seven years, the partner can redeem and receive a pro-rata slice of the diversified pool as a distribution. IRC §731 treats that distribution as non-taxable to the extent of the partner’s basis in the partnership interest, which still carries over from the originally contributed stock.
The partner ends up with a basket of individual stocks with carryover basis from the original concentrated position. If the partner holds those positions, no gain has been recognized yet. If the partner later sells, gain is recognized at that time at the partner’s basis in each distributed stock.
The seven-year clock is hard. Partial withdrawal, death, and some hardship situations have specific treatment, but in general, funds in, diversified out seven years later. Partners who might need liquidity inside that window should not contribute.
Comparison: exchange fund vs alternatives
| Strategy | Triggers gain now | Lockup | Ongoing cost | Diversification achieved |
|---|---|---|---|---|
| Sell and diversify | Yes, full gain | None | Low (ETF fees) | Full |
| Exchange fund | No | 7 years | 0.85-1.5% plus 25% non-equity drag | ~75% (25% real assets) |
| Collar + SBLOC | No | Option term (1-3 years) | Option premium + loan interest | None directly, but can deploy borrowed cash |
| Charitable remainder trust | Partial (over time) | Life or term | Trustee fees | Over the term |
| Staged selling | Yes, spread over years | None | Low | Over the period |
| Variable prepaid forward | No (deferred) | Contract term (2-5 years) | Implicit financing cost | Via borrowed proceeds |
Exchange funds specifically solve the case where the holder does not need liquidity and wants diversification without a gain. Other tools fit other situations.
Costs and hidden drags
Management fees on exchange funds typically run 0.85% to 1.50% per year. A seven-year holding at 1.25% compounds to roughly 8.5% of total value as fees.
The 25% non-equity asset drag has its own cost. If equities return 8% per year and the non-equity sleeve returns 4%, the fund’s blended return is 7%. Compounded over seven years, that’s roughly 7% less terminal value than a pure equity portfolio would produce. Some of that is offset by reduced concentration risk, but the drag is real.
Tax cost of alternatives. The exchange fund defers the gain, it does not eliminate it. Basis carries over. When the partner eventually sells the distributed positions, the tax bill comes due at then-current rates. If the holder dies owning the positions, basis steps up at death under IRC §1014 and the embedded gain is never taxed. For older holders, that is the game: defer until step-up.
When exchange funds do not fit
Holders who need cash in the next seven years. The lockup is binding.
Holders below the qualified purchaser threshold ($5M of investments). These funds are private placements limited to QPs.
Holders of pre-IPO or restricted stock. Exchange funds take freely tradable public stock. A holder of RSUs that have not vested or ISOs that have not been exercised cannot contribute those. Private-stock exchange funds exist but are rare and have different mechanics.
Holders whose concentrated stock has low embedded gain. If basis is 80% of market value, deferring 20% of gain is not worth the lockup and fees. The strategy shines when basis is low and gain is large.
Holders planning to gift the stock to charity or to trusts. Direct gifting of the appreciated stock to a donor-advised fund or CRT produces a bigger tax benefit than deferring through an exchange fund.
Frequently asked
Can I contribute ISO stock that I exercised less than two years ago? The exchange fund exchange itself is not a disqualifying disposition for ISO purposes under IRC §422. Consult the ISO rules carefully; the IRS has not given clear guidance on all fact patterns, and some advisors treat contributions inside the ISO holding period with caution.
What happens if the fund underperforms? Your partnership interest tracks the fund’s NAV. If the fund loses money, you lose money. Exchange funds target market-like returns but diversified; they are not absolute-return strategies.
Can I choose which stocks I receive at redemption? No. You receive a pro-rata slice of whatever the fund holds at the redemption date. Some funds allow preference for or against receiving back your original contributed position; check the offering documents.
Is there a minimum time before I can contribute after receiving the stock? No specific holding-period requirement for contribution, though the fund may screen based on its own diversification needs.
Can I contribute stock that is subject to a 10b5-1 plan? You can exit the 10b5-1 plan and contribute. You cannot contribute shares that are still in the plan’s sell queue.
Next step
If you hold $500K+ of concentrated public stock with low basis and can accept a seven-year lockup, request offering materials from at least two exchange fund sponsors. Compare diversification profiles, fee structures, current qualifying-stock acceptance, and minimum contribution sizes. Run the after-tax, after-fee terminal value against staged selling over the same seven years at your marginal tax rates. For many holders the exchange fund wins; for others (especially those with low gain rates or charitable plans) it does not. The comparison is worth making before any decision.
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