ETF model portfolios vs traditional fund selection: what’s driving the shift
30 JUL, 2026
ETF model portfolios have moved from a niche allocation tool to a structural challenger to traditional fund selection, with third-party model portfolio assets reaching $934 billion as of March 2026, according to Morningstar Direct survey data.
For fund selectors, private bankers and asset managers, the question is no longer whether ETF-based models belong in the conversation, but how fast they are reshaping the economics, the due-diligence process and the division of responsibility across the value chain.
The scale of the shift: model portfolio AUM by the numbers
Morningstar's 2026 US Model Portfolio Landscape survey found that third-party model assets grew 45% in the year to March 2026, more than tripling since the firm's first survey in June 2021.
Separately, Broadridge Financial Solutions' Model Portfolios Quarterly Trends Report put model portfolios at roughly a third of all assets held in retail intermediary channels in the first quarter of 2026.
| Metric | Figure | Source / period |
|---|---|---|
| Third-party model portfolio assets | $934bn | Morningstar Direct, March 2026 |
| Year-over-year growth | +45% | Morningstar, March 2026 |
| 2025 net inflows into models | ~$43bn (+42% vs. 2024) | Morningstar survey, 18 reporting firms |
| Share of retail intermediary assets | ~33% | Broadridge, Q1 2026 |
| Projected market size | $18.6 trillion by 2030 | Broadridge projection |
Cerulli Associates and Morningstar independently corroborate the trend, both pointing to advisors' growing reliance on models as a structural rather than cyclical development in fund distribution.
ETFs are winning the wrapper war inside models
Between March 2021 and March 2026, ETFs overtook mutual funds as the dominant vehicle inside model portfolios. The average model now holds 55.4% of assets in ETFs versus 34% in mutual funds, a 13.1 percentage point swing over five years, per Morningstar Direct.
Active ETFs are the fastest-moving part of that allocation. Their share of the average model's ETF sleeve climbed from 9% in 2021 to 29% by March 2026, as providers use the wrapper to deliver differentiated exposure without giving up its tax and cost efficiency.
Hybrid construction: why mutual funds haven't disappeared from models
The shift toward ETFs is not an all-or-nothing move. Industry data cited by Natixis Investment Managers show 94% of model providers use both mutual funds and ETFs, and 81% deliberately blend the two structures rather than standardising on one.
Some active strategies with strong long-term records still only exist as mutual funds, which keeps the vehicle relevant in a model's strategic core. Brian Hess, portfolio manager at Natixis Investment Managers, says a hybrid structure lets providers "maintain access to these strategies" without giving up ETF-driven flexibility elsewhere in the model.
In practice, Natixis pairs a strategic core of actively managed mutual funds with a tactical ETF overlay for shorter-horizon adjustments, a structure increasingly common among providers that want ETF efficiency without losing access to mutual-fund-only strategies.
Why the economics favour outsourced ETF models
The average expense ratio of ETFs held in models rose from 0.22% in 2021 to 0.26% in 2026 as active ETFs, which charge more than passive ones, took share. Even so, model portfolios kept a clear cost edge over comparable mutual fund alternatives.
| Cost metric | Model portfolios | Cheapest mutual fund share class |
|---|---|---|
| Asset-weighted expense ratio (year-end 2025) | 0.35% | 0.61% |
| Average underlying ETF expense ratio, 2021 → 2026 | 0.22% → 0.26% | — |
Source: Morningstar Direct and author's calculations, data as of March 31, 2026. Cost is only part of the appeal: in Morningstar's 2026 Investor Perspectives survey, advisors ranked simpler investment processes, time savings and more capacity for client relationships and planning as the top-cited benefits of moving selection to a model.
The regulatory backdrop: MiFID II and where responsibility sits
MiFID II's fee-disclosure requirements have made costs easier to compare across providers, reinforcing the structural advantage of lower-cost model architectures. But the framework has not resolved a more delicate question for European distributors: who is accountable when a model, rather than an individual fund, sits at the centre of the recommendation.
When an adviser runs a third-party model on an advisory basis rather than under discretionary permissions, responsibility for suitability and risk monitoring can sit ambiguously between the adviser, the platform and the discretionary manager.
This includes MiFID II's requirement to notify clients within 24 hours of a 10% portfolio fall. Selectors should treat this allocation of responsibility as a due-diligence item, not an assumption.
What traditional fund selection still does better
The case for ETF models is not unconditional. Standardisation is the trade-off for scale: a model is built for a client segment, not for a single mandate, so bespoke or highly concentrated objectives can still be served better through direct fund selection.
Liquidity is the sharpest emerging risk. Some 69% of firms surveyed by Morningstar already offer, or plan to offer, private-market exposure within three years, largely through semiliquid vehicles: interval funds, tender-offer funds, non-traded REITs and non-traded BDCs.
These structures typically gate redemptions to a quarterly window, a liquidity profile that differs materially from the daily liquidity investors associate with ETF-based models.
BlackRock's March 2025 partnership with iCapital and GeoWealth to build custom models incorporating semiliquid private equity and credit funds illustrates the direction of travel. For selectors, the condition that would break the "ETF models are simply cheaper and easier" thesis is precisely this: private-market sleeves that reintroduce the liquidity and complexity that ETF wrappers were meant to remove.
Europe's fund selectors and private bankers: adapting mid-shift
The European ETF market marked its 25th anniversary in 2026, and adoption momentum remains strong on the retail side. BBH's 2026 Global ETF Investor Survey found that 94% of European ETF investors expect to increase their ETF exposure over the next 12 months, with 34% planning increases of 10% or more.
Germany remains the clearest example of that momentum: 14.5 million ETF holders generated €20.5 billion of inflows in the first quarter of 2025 alone, much of it through ETF savings plans, per BBH. Retail ETF adoption at this scale builds the distribution infrastructure that institutional model portfolios and private banking platforms are now building on.
Practical considerations for fund selectors and private bankers
Evaluating a third-party ETF model is a different exercise from evaluating a single fund. A few checks are becoming standard practice among institutional buyers:
- Cost stacking: separate the DFM's annual management charge from the OCF of the underlying ETFs to see the true all-in cost.
- Discretionary status: confirm whether the model runs under discretionary permissions or an advisory arrangement, and who owns suitability documentation.
- Liquidity gating: for models with private-market sleeves, check redemption frequency and any lock-up or gate provisions before allocating.
- Rebalancing cadence: quarterly or semi-annual rebalancing schedules affect tax efficiency and tracking versus the stated allocation.
- Platform availability: verify the model's underlying ETFs are accessible on the institutional platforms the firm actually uses, such as Allfunds or Inversis.
Frequently asked questions
What is an ETF model portfolio?
An ETF model portfolio is a pre-constructed, professionally managed asset allocation built primarily from exchange-traded funds, distributed to advisers and private bankers to implement across many client accounts. It replaces individual fund-by-fund selection with a single, centrally managed allocation.
Are ETF model portfolios cheaper than traditional fund selection?
On an asset-weighted basis, yes: Morningstar put the average model portfolio's expense ratio at 0.35% at year-end 2025, against 0.61% for the average cheapest mutual fund share class. The gap has narrowed slightly as active ETFs gain share within models.
Why are private banks and advisers outsourcing to model portfolios?
Morningstar's 2026 advisor survey cites simpler investment processes, time savings and greater capacity for client relationships and financial planning as the top-ranked benefits, alongside the structural cost advantage over actively selected mutual fund portfolios.
What risks should institutional selectors watch as private markets enter model portfolios?
The main risk is a liquidity mismatch: semiliquid vehicles such as interval funds and non-traded REITs or BDCs typically only allow redemptions on a quarterly basis. Selectors should confirm gating terms before treating a private-market sleeve as equivalent to the rest of an ETF-based model.
The direction of the shift is clear: ETF model portfolios have moved from a distribution curiosity to a nearly trillion-dollar segment of the advice industry, with the ETF wrapper as their default building block. The practical question for selectors is no longer models versus funds in the abstract, but which mandates are better served by a scaled, lower-cost model.
The private-markets sleeve now entering model portfolios is the element most worth monitoring over the next few years. It is also the one place where the cost and simplicity argument for ETF models meets its natural limit, reintroducing the liquidity questions and due-diligence burden that models were originally built to remove.
This article is for informational purposes only and does not constitute investment advice. Figures are sourced from Morningstar Direct, Broadridge Financial Solutions, BBH and Natixis Investment Managers as cited, and are current as of the publication date; expense ratios and asset figures may change.
