The US ETF market has never been larger or more complicated to navigate. There was $15.8 trillion parked in 5,401 US-domiciled ETFs at the end of June 2026.
According to Morningstar Manager Research's State of US ETFs 2026 report, authored by analysts Zachary Evens and Daniel Sotiroff, CFA, associate director of passive strategies, more than 1,000 new funds launched in 2025 alone, and the pace has not slowed.
What is going into the ETF wrapper increasingly bears little resemblance to the index funds that built the industry. The Morningstar report draws a sharp distinction between three generations of ETFs - simple index trackers, active and factor-based strategies, and a newer cohort of derivative-driven products that the report's authors describe as resembling gambling more than investing.
And the proliferation of choice has made the selection process more consequential than ever as highlighted in a recent InvestmentNews interview with Dimensional Fund Advisors’ global head of investment solutions, Marlena Lee.
Passively managed, or index-based, ETFs remain by far the largest segment of the US market, collecting 87.5% of total ETF assets. Three S&P 500 index funds - Vanguard's VOO, iShares' IVV, and State Street's SPY - alone account for approximately 17% of all money in US ETFs, according to the Morningstar data.
But the gravitational pull of active management is reshaping how the industry grows. Actively managed ETFs accounted for 12.5% of all ETF assets at the end of June 2026, with the surge in active launches catalyzed by the SEC's adoption of Rule 6c-11, known as the ETF Rule, in 2019, which made it far easier for active fund managers to enter the ETF wrapper without compromising their investment process.
Active ETF assets have crossed $1.47 trillion, growing at a 59% compound annual rate over the past three years, according to ETF.com. Despite that momentum, performance data remain sobering. The most recent SPIVA scorecard, published in early 2026, found that 79% of actively managed large-cap US equity funds underperformed the S&P 500 in 2025. Over a ten-year horizon, only 24% of active ETFs have beaten their benchmarks.
That underperformance record has not slowed asset gathering, in part because not all active ETFs are trying to beat the market. The largest providers in the active space - Dimensional Fund Advisors, J.P. Morgan Asset Management, and Capital Group - largely offer systematic or rules-based strategies that sit somewhere between pure indexing and discretionary stock picking.
Alongside the active ETF boom, a structural shift in how fund companies distribute their products is reshaping the competitive landscape and creating new options for advisors managing clients across taxable and retirement accounts. Since Guinness Atkinson converted two funds into ETFs in March 2021, another 208 mutual funds opted to convert to an ETF format through June 30, 2026.
A more consequential development is the emergence of dual share class funds, which allow both ETF and mutual fund investors to access the same portfolio.
As of late 2025, the SEC had approved dual share class structures for several fund families, and on December 17, 2025, issued a combined notice to 30 additional firms of its intent to approve their applications.
A client in a brokerage account and one in a 401(k) can hold the same strategy without the advisor managing separate, potentially divergent products.
Advisors looking to understand the portfolio construction implications of these changes can review InvestmentNews' coverage of ETF product trends and advisor portfolio strategies for context on how the market is evolving.
The fastest-growing ETF launch categories in 2026 include trading-leveraged equity funds with 218 launches in the first half of the year alone, defined outcome ETFs with 65 launches, and derivative income products with 46 launches, according to Morningstar Direct data through June 30, 2026.
Derivative income ETFs have attracted significant assets. The category picked up approximately $54 billion in net new assets in 2025, making it the single most popular category among actively managed ETFs that year, with combined assets under management of roughly $130 billion, according to data from J.P. Morgan Asset Management. Defined outcome ETFs, which use options to cap losses in exchange for capped gains, occupy a different risk profile but rely on similarly complex mechanics.
The Morningstar report is blunter about what comes next: more than 50% of ETFs in the pre-launch queue aim to manipulate the returns of a single stock using derivatives, and the authors conclude that most soon-to-be-launched ETFs look more like gambling than investing.
Tidal was the largest white-label ETF provider as of June 30, 2026, acting as listed advisor or subadvisor on 410 ETFs with $60.4 billion in total assets, reflecting how low the barrier to launching a fund has become.
Not every third-generation ETF is a product to avoid, however. The Morningstar analysis highlights two tax-focused innovations (box-spread ETFs and funds seeded through Section 351 conversions) as among the more promising recent developments for advisors working with tax-sensitive clients. Box-spread ETFs package a specific options strategy that gives investors short-term bond-equivalent returns with no distributions, so investors realize taxable capital gains only when they sell the ETF. As of the report date, six such ETFs were available in the US market.
For the majority of investors, the strategies that built the ETF industry - broad, low-cost, tax-efficient index funds - remain the most defensible core. Active ETFs play a legitimate role in portfolios, particularly rules-based systematic strategies with multi-year track records. The derivative-driven segment warrants scrutiny.
US-listed ETF inflows crossed the $1 trillion mark for 2026 by mid-June, less than halfway through the year, according to Bloomberg data - a pace that Todd Rosenbluth, head of research at VettaFi, described as shocking even against the backdrop of consecutive record-setting years.
The volume of capital moving through the ETF market makes the due diligence process more important, not less. With 5,401 funds available and hundreds more in the launch queue, the burden on advisors to distinguish between instruments designed to serve clients and those designed to generate fee revenue for issuers has rarely been heavier.
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