Thematic ETFs:
buying the story after the top.

Supply follows hype, not opportunity

Fund launches are a contrarian indicator. Issuers file for new thematic products when media coverage, search interest, and recent returns are all climbing, because that is when the funds will sell. The launch is timed for maximum attention, not maximum expected return. By the time a theme is popular enough to justify its own ETF, the easy gains are behind it.

The cycle is visible in the launch data. Following a record-breaking 2021, when markets peaked and roughly 670 new thematic funds were introduced globally, the category cratered. Global thematic assets had surged more than threefold to a peak near $892 billion before tumbling.^[2] New launches peak with the hype and collapse with it, which is precisely backward from when a disciplined investor would want to buy.

The 30% finding

The definitive study is Ben-David, Franzoni, Kim & Moussawi, "Competition for Attention in the ETF Space," published in the Review of Financial Studies in 2023.^[1] Examining ETFs from 2000 to 2019, they separate broad-based index funds from "specialized" ETFs, the narrow, single-theme and sector products that thematic funds belong to, and track what happens after launch.

Broken down annually, a portfolio of all specialized ETFs delivered risk-adjusted returns of about −3.1% per year after fees, with the underperformance concentrated in the years right after launch, the newly-launched cohort runs at roughly −6% per year in those first five years.^[1] Broad-based ETFs, by contrast, sit near zero alpha, exactly what you'd expect from a cheap index tracker. The gap between specialized and broad-based ETFs is roughly −3% per year, and it is not noise.

Crucially, the authors show this cannot be explained by the higher fees alone, the gross-of-fee numbers look just as bad. The driver is overvaluation of the underlying stocks at the moment the fund is created. Issuers are catering to investors' extrapolative beliefs: they package the stocks people are already excited about, precisely when those stocks are most overpriced.

Survivorship: most of them die

Underperformance is only half the story. The other half is that the funds themselves frequently disappear, which makes the surviving track records look far better than the lived experience of investors. Morningstar's Global Thematic Fund Landscape quantifies the carnage.

Source: Morningstar Global Thematic Fund Landscape, data as of June 30, 2024.^[3]

Over the 15 years leading up to mid-2024, 60% of thematic funds closed entirely verify×DON'T TRUST, VERIFYClaim: Over the 15 years to mid-2024, 60% of thematic funds closed, and only 9% both survived and outperformed a global equity benchmark.Verify at: Morningstar ↗Figures from Morningstar's Global Thematic Fund Landscape report (data as of June 30, 2024). Confirm the closure rate and the 9% survive-and-outperform figure., and only 9% both survived and beat a plain global equity index. Over the trailing three years, only about one in twenty did. In the US, fund closures outnumbered launches for the first time since 2008 during the first half of 2024. Europe was worse still: 68% of the thematic funds that existed in mid-2009 had shuttered by mid-2024.^[3]

Higher fees, fee-insensitive buyers

Specialized ETFs charge more than broad index funds, and they get away with it because the people buying them aren't shopping on price. In the academic sample, specialized ETFs carried a median expense ratio of about 58 basis points versus 35 for broad-based funds, with the full range running from 4 bps to over 150 bps.^[1] Morningstar finds both active and passive thematic funds charge fees that are many multiples higher than their non-thematic counterparts on an asset-weighted basis.^[3]

This is the giveaway. A cost-conscious investor compares a 0.03% total-market fund against a 0.60% thematic fund and walks. The thematic buyer doesn't, because they aren't optimizing for cost, they're chasing a story, and the story drowns out the expense ratio. The marketing isn't about the math; it's about steering attention away from it. Financial product marketing works on exactly this principle: a salient narrative out front, the cost quietly buried.

Compounded over a multi-decade holding period, a fee gap of half a percent or more is a meaningful drag on its own, before the overvaluation problem even enters the picture. Against a near-zero-cost index, high relative fees compounded over many years are a direct, mechanical reason these funds lag.

The mechanism: peak hype, reflexive inflows, mean reversion

Put the pieces together and the failure is structural, not bad luck:

1. Launch at peak attention. The fund is created because the theme is hot, which means the underlying stocks are already richly valued, high market-to-book, high sentiment, the classic markers of overvaluation.
2. Reflexive inflows. Investors extrapolate the recent run-up and pour money in after the gains. Money chases performance, not the other way around.
3. Mean reversion. Overvalued stocks revert. The post-launch alpha is negative because the entry valuation was unsustainable, and it tends to be worst in the very first years.

Then a second, behavioral layer makes the lived outcome worse than even the fund's own bad returns. Because thematic funds are volatile and exotic, investors trade them at the worst times, buying after a surge, selling after a slump. Morningstar's dollar-weighted return analysis finds that over a recent five-year window, thematic funds returned about 7.3% annualized while the typical investor in them earned just 2.4% verify×DON'T TRUST, VERIFYClaim: Over a recent five-year window, thematic funds returned ~7.3% annualized while investors in them captured only ~2.4%, a ~4.9 percentage-point behavior gap.Verify at: Morningstar Mind the Gap ↗Morningstar's "Mind the Gap" research on dollar-weighted vs. total returns for thematic funds. Confirm the gap figure and window., a roughly five-point gap they forfeited purely to bad timing. Sector and thematic funds show the widest such gaps of any category.^[4]

This is behavioral finance in its purest form: the product is engineered to be bought at the wrong time, and its volatility ensures investors keep buying and selling at the wrong times after that.

The takeaway: own the haystack

If a theme is genuinely going to reshape the economy, the companies that win are already inside a broad total-market index fund, you own them, at a fair weight, for three basis points, with no narrative premium and no closure risk. You don't need to guess which clean-energy or AI names survive; the index holds the survivors automatically and drops the losers without you paying an exit toll.

When you feel the pull of a themed ticker, ask the one question the marketing is built to suppress: am I buying this on its risk-adjusted, after-fee numbers, or on the story? If it's the story, you're almost certainly buying the top.

Related reading

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