A structural provision in US tax law allows exchange-traded funds to remove appreciated securities without recognising fund-level capital gains. Bloomberg reports the cumulative benefit at $48 billion.
For ultra-high-net-worth investors with access to estate planning and charitable transfer strategies, what begins as capital gains tax deferral can become permanent avoidance. The mechanism is legal, quantifiable and overwhelmingly concentrated among the wealthiest taxable investors in the United States.
Executive Summary
- IRC Section 852(b)(6) enables ETFs to remove appreciated securities without fund-level capital gains recognition, a statutory structural advantage.
- Bloomberg reports the benefit at $48 billion; the accurate fiscal measure, net present value of permanent avoidance, is materially lower.
- The top one per cent captures an estimated 45 to 55 per cent of the total annual tax benefit.
- UHNW principals convert deferral to permanent avoidance through step-up in basis, charitable transfers and securities-backed borrowing.
- Near-term reform probability is low; wealth principals should audit embedded gain concentrations and align estate planning with ETF holdings.
There is a feature of US exchange-traded fund architecture that has attracted relatively little public scrutiny relative to its financial significance. It is not a novel product innovation or a proprietary trading strategy. It is a structural interaction between a provision of the Internal Revenue Code and the mechanics of ETF creation and redemption that allows appreciated portfolio securities to exit a fund’s holdings without triggering recognition of capital gains at the fund level.
For principals engaged in generational wealth management, this structural feature deserves the same rigour of analysis applied to asset selection itself: it is not a peripheral detail of fund administration but a quantifiable, compounding advantage that shapes the after-tax trajectory of large taxable portfolios across decades and across generations.
Bloomberg’s June 2026 investigation, titled “The Top 1% Reap Most From Tax Loophole Costing $48 Billion”, brought this mechanism to wider public attention.
That headline figure is treated here as a reported claim, given that the primary investigation is behind a paywall and the methodological scope of the estimate requires careful independent assessment.
What is not in question is that the ETF tax efficiency mechanism is real, it is legal, it operates within the explicit bounds of statutory law, and its distributional consequences are heavily concentrated among investors at the very top of the wealth distribution.
Understanding how ETF heartbeat trades avoid capital gains taxes for wealthy investors requires working through the statutory architecture, the transactional mechanics and the interaction of those mechanics with the estate planning, charitable transfer and wealth preservation tools available to ultra-high-net-worth principals in taxable accounts.
With US equity ETF assets under management reaching approximately $9.3 trillion at year-end 2024, according to Investment Company Institute data, the aggregate tax advantage embedded within that infrastructure warrants analysis delivered with the precision that consequential capital decisions demand.
How ETF Heartbeat Trades Work: The Creation and Redemption Mechanism
The ETF creation and redemption process involves five principal parties: the ETF sponsor responsible for portfolio management and fund administration; the custodian holding the portfolio securities; the authorised participant, a financial institution with contractual rights to transact directly with the fund in large blocks called creation units; the index provider specifying the reference portfolio for passive funds; and the secondary-market investor who buys or sells ETF shares on an exchange. Unlike mutual fund shares, ETF creation units are assembled and redeemed exclusively through authorised participants, and these transactions can be effected either in cash or through the delivery and receipt of a basket of underlying securities.
When an authorised participant elects an in-kind redemption, it delivers a block of ETF shares to the fund and receives in return a basket of underlying securities rather than cash. The critical tax consequence follows from Internal Revenue Code Section 852(b)(6), which provides that an ETF, as a regulated investment company, does not recognise a gain when it distributes appreciated securities in kind to a redeeming party. The appreciation in those securities passes unrecognised at the fund level. The authorised participant receives the securities at the fund’s own potentially very low cost basis and will typically sell or hedge them, recognising the embedded gain on its own tax return rather than the fund’s. The mechanism transfers gain recognition rather than eliminating it; the distinction matters enormously for fiscal analysis, because the aggregate gain removed from fund portfolios through in-kind redemptions is not equivalent to the tax permanently lost to the Treasury.
When an ETF heartbeat trade is explained for institutional investors, the sequence reveals a deliberate layering of these mechanics. The authorised participant first creates a large block of new ETF shares by delivering cash to the fund. The fund manager uses that cash to purchase new securities at current market prices, establishing a high cost basis equal to the purchase price. Shortly thereafter, the same authorised participant redeems the ETF shares it created. Under the custom basket rules liberalised by SEC Rule 6c-11, effective December 2019, the fund manager can construct a non-proportional redemption basket that delivers the older, lower-basis appreciated securities rather than the newly purchased high-basis ones.
The result is that the embedded gain in the old securities exits the fund portfolio without generating a taxable distribution, whilst the fund retains the high-basis securities purchased with the creation proceeds. How custom redemption baskets remove embedded gains from ETF portfolios in this way is precisely the mechanism the Bloomberg investigation places in the public domain.
A simplified illustration conveys the mechanics. An ETF holds five million shares of a technology holding acquired at $40 per share; the current market price is $200, creating an embedded gain of $160 per share and an aggregate unrealised gain of $800 million. An authorised participant creates one million new ETF shares by delivering $200 million in cash; the fund purchases additional shares at $200, establishing a new lot at full market basis. The authorised participant then redeems its one million shares through a custom basket weighted toward the original low-basis position. The fund delivers one million shares of the old lot at a $40 basis; the embedded gain removed from the fund is $160 million; and the deferred federal tax benefit to remaining ETF shareholders, at the 23.8 per cent combined long-term capital gains and net investment income tax rate, is approximately $38 million in this illustration.
The transaction resembles a heartbeat in fund-flow data because assets under management spike on the creation and return to their prior level on the redemption, with the fund’s tax profile materially improved in the interval. A modest cost attaches in the form of bid-ask spread and market impact; for large-cap, highly liquid positions, this is estimated at under five basis points of the transaction amount and is borne by remaining fund shareholders.
IRC Section 852(b)(6) and the Statutory Origins of ETF Tax Efficiency
The legal foundation of the ETF tax efficiency mechanism is not a recent administrative interpretation reversible without legislative action. It is a codified provision of the Internal Revenue Code with roots in the Investment Company Act of 1940, which established the framework for regulated investment company taxation in the United States.
What is IRC Section 852(b)(6) and how does it benefit ETF investors in taxable accounts?
At its operative core, the provision ensures that a regulated investment company does not recognise a gain on the in-kind distribution of appreciated portfolio securities to redeeming shareholders. Section 852 was consolidated in its current form by the Tax Reform Act of 1986, and the provision predates the ETF industry by approximately half a century: the SPDR S&P 500 Trust, the first US exchange-traded fund, launched in January 1993, more than four decades after the statutory framework enabling its tax efficiency was drafted.
Congress did not design the provision with ETF heartbeat trades in mind.
The Obama administration’s Fiscal Year 2016 budget proposal identified the mechanism explicitly, proposing to require regulated investment companies to recognise gain on in-kind distributions of appreciated securities. The Joint Committee on Taxation estimated the revenue effect at approximately $3.5 billion over ten years. The proposal was not enacted, and its non-enactment represents a deliberate legislative choice rather than an oversight. No authoritative Internal Revenue Service ruling or court decision has challenged the current treatment under anti-abuse doctrines, including the economic substance doctrine codified in IRC Section 7701(o). The reform path, if it materialises, is almost certainly legislative rather than administrative.
The decisive regulatory development that amplified the mechanism from periodic use to systematic application was SEC Rule 6c-11, adopted September 2019 and effective December 2019. Prior to Rule 6c-11, ETFs operated under individual exemptive orders that typically required creation and redemption baskets to be substantially proportional to the fund’s portfolio. Rule 6c-11 standardised and liberalised these requirements, permitting non-proportional custom baskets subject to board-adopted policies and enhanced disclosure obligations.
The SEC Rule 6c-11 non-pro-rata redemption basket tax implications of this change are precisely what the Bloomberg investigation now quantifies at scale: the interaction of statutory non-recognition and regulatory liberalisation created the conditions for systematic heartbeat trade activity across the ETF industry after December 2019.
What the Bloomberg $48 Billion ETF Tax Figure Actually Measures
The $48 billion figure reported by Bloomberg requires careful analytical decomposition before it can serve as a foundation for portfolio or policy decisions. The term “cost” in Bloomberg’s framing implies permanent revenue foregone by the federal government, but that interpretation conflates at least five materially distinct concepts, each of which produces a different number and supports different conclusions.
The broadest interpretation is aggregate capital gains removed from ETF portfolios through in-kind redemptions over some defined period: the gross flows figure, which measures the appreciation in securities that exited funds via in-kind delivery without triggering fund-level recognition. This is not a tax figure; it is a gross transfer value. At the combined federal rate of 23.8 per cent, the associated tax would be a fraction of this amount, and only the portion that is never eventually collected constitutes permanent revenue loss to the Treasury.
A narrower interpretation treats $48 billion as estimated cumulative federal capital gains tax deferred across the US ETF industry over a multi-year window, most probably 2015 to 2025, calculated by applying prevailing long-term capital gains rates to the gains removed through in-kind redemptions. This is the most defensible reading of the figure when triangulated against publicly available ICI data, academic estimates of heartbeat trade volume and prior comparable analyses.
Under this interpretation, $48 billion represents deferred tax, not permanently foregone revenue, and a substantial portion will eventually be collected when investors sell their ETF holdings during their lifetimes.
The correct fiscal metric is neither of these. It is the net present value of capital gains taxes that will never be collected because of step-up in basis at death, charitable transfer or other permanent avoidance pathways, combined with the time value of the deferral on taxes that will ultimately be paid. Applying a 30 per cent permanent avoidance rate and a five per cent discount rate to the deferred tax stock, the annual net present value of the mechanism’s true fiscal cost is estimated at $8 billion to $15 billion per annum. That is materially lower than $48 billion, and it does not support characterising the full amount as permanent annual revenue loss.
Whether the ETF tax loophole for ultra-high-net-worth investors in 2026 represents a structural fiscal emergency or a quantifiable feature of capital markets taxation depends critically on which of these interpretations one applies. The Obama-era Joint Committee on Taxation estimate of $3.5 billion over ten years, though prepared against a far smaller ETF universe, is broadly consistent in order of magnitude with the adjusted figure and provides a useful lower-bound reference point.
The Distributional Reality: UHNW Investors and the Concentration of ETF Tax Benefit
The concentration of the ETF tax advantage among the wealthiest investors follows directly from three structural facts operating in combination. The Federal Reserve’s Distributional Financial Accounts, most recently updated for the third quarter of 2024, report that the top one per cent of US households by wealth hold approximately 38 per cent of corporate equities and mutual fund shares, whilst the top 10 per cent hold approximately 87 per cent and the bottom 50 per cent hold approximately two per cent.
These figures represent the starting point for distributional analysis but systematically understate the concentration of the ETF tax benefit in three important respects.
- The first amplification mechanism is the marginal capital gains tax rate differential. How billionaires use ETF structures to reduce capital gains tax liability is partly a function of scale but more fundamentally a function of marginal rate. An investor in the top wealth bracket faces a combined federal rate of 23.8 per cent, comprising the 20 per cent long-term capital gains rate and the 3.8 per cent net investment income tax, plus applicable state rates ranging from zero in Texas and Florida to approximately 13.3 per cent in California. An investor with income below the relevant threshold may face 15 per cent or even zero per cent federal long-term capital gains rates. The dollar value of deferring a dollar of gain is therefore more than 50 per cent greater for a billionaire in a high-tax state than for a middle-income investor in the same market, even before portfolio scale is considered.
- The second amplification mechanism is portfolio scale. The present-value benefit of deferring $100 million in capital gains tax for 20 years at a five per cent discount rate is approximately $62 million. The same calculation applied to a $10,000 tax liability is economically trivial. The ETF tax efficiency advantage scales with the size of the taxable holding and delivers disproportionately large absolute dollar benefits to those with the largest positions.
- The third and most consequential amplification mechanism is differential access to permanent avoidance pathways. Investors holding ETF shares in retirement accounts, which represent approximately 35 to 40 per cent of total ETF assets under management, receive no capital gains tax benefit from the in-kind mechanism, since tax-deferred account distributions are taxed as ordinary income on withdrawal regardless of how the fund managed its portfolio. Tax-exempt institutions, including endowments, pension funds and foundations, are similarly excluded. The benefit accrues exclusively to taxable investors, and within that cohort its value is maximised by those with the longest expected holding periods, the highest marginal rates and the greatest access to estate, charitable and trust planning structures that can convert deferral into permanent avoidance. Research modelling estimates that the top one per cent of wealth holders captures between 45 and 55 per cent of the annual ETF tax benefit, materially disproportionate to their 38 per cent ownership share of equities. The top 0.1 per cent is estimated to capture between 25 and 30 per cent of the total benefit, and within that cohort the predominant disposition outcome is permanent avoidance rather than eventual recognition.
How in-kind ETF redemption differs from mutual fund redemption for capital gains purposes is, at the fund level, absolute: the mutual fund investor faces annual capital gains distributions taxable in the year received; the ETF investor in a taxable account faces no capital gains liability until a voluntary sale, with systematic gain removal operating continuously at the fund level throughout the holding period.
From Capital Gains Tax Deferral to Permanent Avoidance: The UHNW Distinction
For principals whose wealth architecture is built around generational continuity rather than short-cycle performance measurement, characterising the ETF tax mechanism as mere “deferral” systematically understates the true economic advantage.
Eight distinct disposition pathways determine whether a dollar of deferred capital gains tax is ultimately paid, reduced or entirely eliminated, and for investors at the top of the wealth distribution, the pathways leading to permanent elimination are sufficiently accessible that forward planning warrants treating them as the baseline expectation rather than the exception.
The most consequential pathway for intergenerational wealth preservation is death and the associated step-up in cost basis under IRC Section 1014. How step-up in basis interacts with ETF capital gains deferral for family offices is, in practice, a relationship of compounding advantage: when an investor holds an ETF position until death, the estate receives the shares at a basis stepped up to fair market value at the date of death, permanently extinguishing all accumulated capital gains regardless of their origin. For a principal holding a $100 million ETF position with a 50 per cent embedded gain, the step-up eliminates a federal tax liability of approximately $11.9 million without requiring any proactive planning beyond the decision to hold.
Charitable transfer provides a second pathway to permanent avoidance, and one that additionally generates income tax relief. An investor who donates appreciated ETF shares in specie to a qualifying charity or a donor-advised fund pays no capital gains tax on the donated appreciation and receives a charitable deduction at fair market value, subject to an adjusted gross income limitation of 30 per cent for appreciated securities transferred to public charities, with a five-year carryforward for unused deductions.
A private foundation offers a related but more restricted variant, with deduction limitations tied to the donor’s basis in certain cases. The strategy known as buy, borrow, die allows investors to access liquidity through securities-backed lending without triggering a taxable realisation event, deferring the capital gains liability indefinitely whilst maintaining the portfolio position; the interest cost of such borrowing is generally non-deductible following changes introduced by the Tax Cuts and Jobs Act of 2017, but for investors whose borrowing costs are modest relative to the compounding benefit of continued deferral, the strategy remains economically rational.
The quantified magnitudes are material. For a $1 million taxable ETF portfolio with a 50 per cent embedded gain at a 23.8 per cent effective federal rate, the deferred tax liability is approximately $119,000; a 20-year hold followed by death eliminates that liability entirely. For a $1 billion portfolio employing a blended approach in which 50 per cent of assets are eventually sold in the market, 30 per cent pass through the estate and 20 per cent are transferred to charitable vehicles, the estimated elimination of the nominal tax liability ranges from $85 million to $110 million.
These are modelled results and should be treated as illustrative; individual outcomes depend on portfolio composition, holding period and the specific planning structures employed. They are, nonetheless, large enough to constitute a defining feature of any serious wealth preservation analysis at UHNW scale.
For legacy planners managing wealth across generations rather than optimising for a single market cycle, this distinction between tax deferred and tax never owed is not a technical footnote. It is the central value proposition of the mechanism.
The Market Efficiency Case for the In-Kind Redemption Mechanism
A rigorous treatment of ETF heartbeat trades requires engaging seriously with the arguments made in defence of the current statutory treatment, several of which have material analytical force that proponents of reform must address with equivalent precision and intellectual honesty.
- The first argument is statutory legitimacy. Congress was explicitly aware of the ETF in-kind mechanism when it declined to enact the Obama administration’s 2015 reform proposal. The current treatment is not an obscure provision exploited through legal fiction; it is the operation of an investment structure within the explicit bounds of legislation that has been reviewed and preserved by legislative inaction across multiple administrations.
- The second argument concerns the protection of ordinary investors from forced capital gains distributions: the in-kind redemption mechanism insulates all ETF shareholders, including middle-income investors in taxable brokerage accounts, from the capital gains distribution cycles that characterise actively managed mutual funds, in which a shareholder may receive a material tax bill in a given year without having sold a single share.
- The third argument addresses market structure: the in-kind redemption mechanism underpins the arbitrage process that maintains close alignment between ETF market prices and underlying net asset values, and a reform that severely restricted it would impair this arbitrage, potentially widening bid-ask spreads and increasing costs for all market participants.
- The fourth argument notes that the alternatives available to UHNW investors if ETF tax efficiency were curtailed, including direct indexing, separately managed accounts and derivative-based structures, are sufficiently developed to absorb much of the displaced capital, making the net revenue gain to the Treasury materially lower than static reform estimates imply.
ETF Reform Scenarios and Capital Gains Reform 2026: What Wealth Principals Must Assess
The Bloomberg investigation has intensified Congressional and regulatory attention on a mechanism that previously occupied a narrow specialist literature. For wealth principals and their advisers operating across international financial markets, the relevant question is not whether the current treatment is philosophically defensible but what probability to assign to reform, in what form and over what horizon.
Bancara’s four-scenario framework for ETF reform assigns the highest probability to the status quo through the current Congressional cycle, on the grounds that the political economy of reform is challenging, industry opposition is organised and technically sophisticated, and the revenue gain, whilst material, is modest relative to other legislative priorities.
The Bloomberg investigation increases the probability of Congressional enquiries and draft legislative proposals but does not, in Bancara’s assessment, materially alter the near-term probability of enacted reform.
Scenario B, targeted anti-heartbeat reform, represents restrictions on temporary, non-proportional or explicitly tax-motivated creation and redemption cycles whilst leaving ordinary in-kind redemptions and their associated market structure functions intact, most probably in the form of a minimum holding period between creation and redemption or a restriction on custom baskets where deviation from proportional composition exceeds a specified threshold.
What would reform of Section 852(b)(6) mean for ultra-high-net-worth ETF investors under this scenario? Ordinary ETF holdings in taxable accounts would be largely unaffected; the direct heartbeat trade benefit would be curtailed; and the annual federal revenue effect is estimated at $2 billion to $5 billion. This scenario carries a low to moderate probability over the 2027 to 2030 horizon and represents the most administratively feasible and politically viable form that reform might take.
Scenario C, broad reform with grandfathering, narrows or repeals Section 852(b)(6) prospectively with transitional protection for existing embedded gains, yielding an estimated annual revenue effect of $8 billion to $15 billion; capital gains distribution rates for ETFs would increase materially, and the liquidity impact would be manageable with an adequate transition period.
Scenario D, broad reform without grandfathering, imposes immediate or accelerated recognition of existing embedded gains, carries a very low probability and would represent a severe adverse event for taxable investors holding large embedded gain positions, with an estimated front-loaded revenue effect of $15 billion to $25 billion and significant potential for forced distribution pressure and liquidity disruption.
Under any reform scenario, the principal market beneficiaries are federal and state tax authorities and direct indexing providers, whose competitive position strengthens as ETF tax efficiency diminishes; the principal losers are UHNW taxable ETF investors, ETF sponsors particularly in the active ETF space, and authorised participant desks.
Family Office ETF Tax Planning and Portfolio Architecture Under Legislative Uncertainty
The practical implication of this analysis for family office investment committees and private bank advisers is that the appropriate response to reform uncertainty is not to reduce ETF allocations prematurely but to ensure the surrounding portfolio architecture is robust to a range of outcomes. The family office asset location ETF taxable account strategy rests on a first-principles observation that applies regardless of whether reform occurs: ETFs in taxable accounts produce minimal capital gains distributions, systematically reduce embedded gain accumulation under the current regime, and deliver superior after-tax returns relative to actively managed mutual fund equivalents.
Fixed income, alternative investments and real estate investment trusts, which generate income taxed at ordinary rates and offer fewer tax-management opportunities in taxable structures, are generally better positioned within tax-deferred or exempt account structures.
How to monitor embedded gains in ETF portfolios for family office risk management is a discipline that many investment committees apply inconsistently. The metrics worth tracking systematically are unrealised gain as a percentage of current value; the associated deferred federal and state tax liability expressed as a dollar amount; holding period and eligibility for long-term capital gains rates by tax lot; and fund distribution susceptibility as proxied by historical distribution frequency and the degree of index rebalancing likely to generate near-term taxable turnover.
For family offices managing taxable ETF positions at the $100 million scale, the aggregate deferred tax liability is large enough to warrant explicit presentation in investment committee reporting as a component of after-tax risk, not merely as a footnote to unrealised performance.
The ETF versus direct indexing tax efficiency comparison for portfolios above $10 million in a single asset class warrants dedicated analysis rather than a default assumption in favour of either structure. Direct indexing generates tax losses at the individual security level, producing carry-forwards that can offset future gains, but requires holding individual securities rather than a pooled vehicle and introduces basis management complexity.
For UHNW principals who anticipate holding positions across decades rather than years, in an environment of generally rising equity markets, the ETF structure’s systematic removal of embedded gains at the fund level may produce superior after-tax outcomes compared to the loss harvesting available through direct indexing. The crossover point is portfolio-specific and depends on expected holding period, market environment and the availability of charitable or estate planning exits.
Bancara’s after-tax return modelling illustrates that the advantage of ETF over comparable mutual fund structures in taxable accounts ranges from approximately 0.3 to 0.7 per cent per annum across portfolios of $1 million to $1 billion, translating to an estimated present-value benefit of approximately $7.5 million on a $100 million portfolio and approximately $75 million on a $1 billion portfolio over a 20-year horizon at a five per cent discount rate, with state tax excluded and all figures treated as modelled results.
On legislative risk monitoring, the indicators warranting active attention are: Congressional committee hearings or draft legislation explicitly referencing Section 852(b)(6) or ETF heartbeat trades; SEC rulemaking notices on custom basket transparency or heartbeat trade disclosure; Joint Committee on Taxation or Congressional Budget Office revenue estimates for ETF in-kind reform; ETF industry lobbying disclosures specifically addressing this provision; changes in ETF capital gains distribution frequency above current levels; and acceleration in direct indexing assets under management growth above the current 20 to 25 per cent annual rate, which would signal that sophisticated investors are beginning to price reform risk into their product allocations.
The Architecture of Enduring Advantage: Managing Legacy, Not Momentum
The ETF heartbeat trade mechanism occupies an unusual position in the landscape of wealth preservation tools available to UHNW families and legacy planners. It requires no active implementation beyond the decision to hold a common investment vehicle in a taxable account; it is a structural feature that delivers material after-tax benefits compounding across time when aligned with estate planning, charitable giving and indefinite holding strategies that are standard elements of any serious multi-generational wealth plan.
The Bloomberg investigation of June 2026 has placed this mechanism in public view in a way that will sustain political attention. The distributional consequences are real: the top one per cent of wealth holders captures the majority of the benefit, and for the wealthiest families, what is presented in headline reporting as deferral is in practice a pathway to substantial permanent tax elimination.
Acknowledging these facts does not require editorial advocacy in either direction. It requires treating the mechanism with the transparency, precision and composure that enduring wealth management demands.
Principals whose capital framework is oriented toward generational continuity will recognise that the ETF tax efficiency mechanism is not a trading opportunity.
It is a structural feature of how wealth compounds within a well-constructed taxable portfolio when managed with discipline, aligned with estate planning and examined with the long view that separates legacy architecture from performance optimisation.
The question it poses is not tactical.
It is architectural: whether the investment structures, estate plans, charitable vehicles and monitoring protocols surrounding a taxable ETF allocation are sufficiently robust to extract the full value of the mechanism today and to adapt with integrity if its statutory foundation changes tomorrow.
Bancara’s view, informed by its engagement with private clients managing wealth across financial centres from Zurich to Dubai and Hong Kong, is that the ETF tax advantage will persist in its current form for at least two to three years with high probability.
The question for those who manage legacy rather than momentum is not whether to use it, but whether to depend on it without the contingency architecture that permanent, generational wealth truly demands.
Works Cited
- https://www.bloomberg.com/graphics/2026-etf-trading-heartbeats/
- https://uscode.house.gov
- https://www.sec.gov/rules/final/2019/ic-33646.pdf
- https://home.treasury.gov
- https://www.jct.gov
- https://www.ici.org/research/stats/factbook
- https://www.federalreserve.gov/releases/z1/dataviz/dfa/
- https://www.ssrn.com