Active ETFs Explained: What's Driving the Shift
Active management has been migrating out of the mutual fund wrapper and into the ETF one. Here's what's driving the shift, and what it doesn't change.
What makes an ETF ‘active’
Every exchange-traded fund is a pooled vehicle whose shares trade on an exchange throughout the day. What varies is the decision-making inside it. An index ETF follows a published rulebook: it holds what the index holds, in the weights the index specifies, and it rebalances when the index rebalances. An active ETF hands a portfolio manager discretion — to overweight some positions and avoid others, to hold cash, to shift a bond portfolio's maturity profile, or to move between sectors on the strength of their own research. The line is blurrier than it sounds, because plenty of index funds track benchmarks that are themselves built on active-looking rules, screening or weighting holdings by characteristics such as value, quality or momentum. The practical test is whether a person is making judgement calls after the fund has launched, or whether a rulebook is.
Why active strategies are moving into the ETF wrapper
For most of the past century, a manager who wanted to run a discretionary stock or bond strategy for ordinary investors did it inside a mutual fund. That has been changing quickly. In an analysis published by staff at the US Securities and Exchange Commission in early 2026, active funds accounted for roughly 9% of American ETF assets at the end of 2024 — still a small slice — but made up close to half of all ETF launches by count that year, and industry trackers suggest the launch share has climbed higher since. Several established fund groups have gone a step further and converted existing mutual funds into ETFs outright, moving the same strategy and often the same manager into a different legal shell. The motivations behind all this are mostly structural rather than philosophical.
- Tax handling: the in-kind creation and redemption mechanism most ETFs use lets appreciated securities leave the fund without gains being realised inside it, which has historically meant fewer capital gains distributions than a comparable mutual fund passes on to its holders.
- Intraday dealing: ETF shares can be bought and sold continuously while the exchange is open, rather than pricing once a day after the close.
- Fee pressure: two decades of falling index fund charges have forced active managers to price more competitively, and the ETF format avoids the layered sales charges attached to some mutual fund share classes.
- Distribution: ETFs sit naturally on the brokerage and advisory platforms where a growing share of money is now managed, which makes them easier to reach investors with.
Semi-transparent and non-transparent structures
One long-standing objection to putting an active strategy in an ETF is disclosure. Conventional ETFs publish their holdings daily, which a manager may see as giving away the research they are paid for, or as an invitation for others to trade ahead of them while they build or unwind a position. In 2019 US regulators approved several structures designed to soften that, generally by publishing a proxy basket that closely tracks the real portfolio's economics without revealing the exact positions, or by disclosing full holdings on a delay. These models were widely expected to open the floodgates. In practice they have remained a niche: as of 2026 the large majority of active ETF assets sit in fully transparent funds, and many managers concluded that daily disclosure cost them less than they had feared. The distinction still matters, because a proxy-basket fund can trade at wider bid-ask spreads when market makers are less certain what they are hedging.
The challenge the wrapper doesn't solve
None of this changes what active management has to overcome. Long-running scorecards that compare active funds with their stated benchmarks — the SPIVA series published by S&P Dow Jones Indices is the best known — have found year after year that a large majority of active funds underperform over ten- and fifteen-year windows, and the shortfall widens as the period lengthens. An ETF wrapper can reduce the tax and cost drag on a strategy, which genuinely matters at the margin, but it does not improve stock selection. Active ETFs also still charge more than broad index funds, and newer, smaller ones carry real closure risk if they fail to gather assets. Costs, structures and regulations change, so confirm current details in a fund's own documents.
This article is educational and general in nature. It isn’t personalized investment, tax, or legal advice — always weigh your own circumstances, or talk to a licensed professional, before making financial decisions.