- ETFs exploit a 1969 tax rule allowing “in-kind” asset swaps without triggering capital gains, costing the U.S. Treasury an estimated $48 billion per year — more than NASA’s entire budget — according to new Bloomberg estimates.
- So-called “heartbeat trades” — sudden large inflows followed by symmetrical outflows over a few days — are the primary mechanism, used to offload appreciated securities tax-free; they’ve grown from under 5% of ETF outflows in the early 2010s to an average of 9% since 2017, and 18% for active funds.
- The top 1% of U.S. households capture 40% of the ETF tax benefit, saving roughly $13,000 per year on average, while those in the middle of the wealth distribution save about $23; an investor with a $100 million ETF portfolio can avoid or defer roughly $682,000 in capital gains taxes annually.
- A recent SEC policy shift — allowing mutual funds to graft on ETF share classes following Vanguard’s patent expiration — could add another $40 billion per year in deferred or avoided taxes, nearly doubling the cost to the government if adopted industry-wide.
What Happened?
Bloomberg published a deep investigation into the tax mechanics of the ETF industry, revealing that a legal but little-discussed loophole is costing the U.S. Treasury an estimated $48 billion per year. The mechanism traces back to a 1969 law allowing funds to swap assets “in-kind” — exchanging stocks for fund shares — without triggering a taxable capital gain. ETFs built their entire structure around this exemption, allowing fund managers to routinely offload appreciated securities without tax. The most engineered version is the heartbeat trade: a bank or market maker makes a large temporary investment in a fund, enabling the manager to swap away unwanted stocks; the outside money then withdraws, leaving the fund cleaner — and less exposed to capital gains. Bloomberg found heartbeat volumes surged to $293 billion last year. Separately, a 2024 SEC rule change is now allowing the largest fund managers to attach ETF share classes to existing mutual funds, potentially widening the loophole to cover the entire $15 trillion ETF-plus-mutual-fund ecosystem.
Why It Matters?
At $48 billion per year, the ETF tax loophole costs more than twice the “no tax on tips” provision passed last year ($10 billion) and more than the recent cuts to ACA health insurance subsidies ($23 billion). Yet it has received almost no public debate. The distributional impact is stark: the top 1% capture 40% of the annual savings, with the average top-earner household pocketing $13,000 per year while middle-income households see about $23. SEC Chairman Paul Atkins framed the new mutual-fund ETF share class policy as a benefit to “everyday investors,” but Bloomberg’s analysis shows the benefit flows overwhelmingly to wealthy investors who hold mutual funds and ETFs outside of tax-advantaged retirement accounts — which is where middle-class savers predominantly hold these assets.
What’s Next?
Congress has shown little appetite to close the loophole — Sen. Ron Wyden’s 2021 proposal to eliminate it went nowhere and was quietly dropped from his updated reform package last year. If the full mutual fund industry adopts the new ETF share class structure, Bloomberg estimates an additional $40 billion in annual tax deferral or avoidance, nearly doubling the current cost. Closing the loophole entirely — even in the ninth year after repeal — would still boost federal revenue by an estimated $22 billion annually, per the Joint Committee on Taxation. Legal scholars describe it as an “accidental tax break” Congress never intended at scale; at current growth rates, the country may soon face serious pressure to revisit it.
Source: Bloomberg
