Most European investors have been seduced by the siren song of thematic ETFs—pouring billions into funds chasing AI, clean energy, or blockchain. But are thematic ETFs worth it in Europe, or are we all playing a dangerous game of sector roulette?
Let’s cut through the marketing hype: Thematic ETFs promise dazzling growth, but most leave investors with underperformance, fat fees, and outsized risk. In 2026, the question isn’t whether you could catch the “next big thing”—it’s whether you should even try with your hard-earned euros. Here’s why I believe thematic ETFs are, for most Europeans, a bad bet versus boring broad-market funds.
The Allure of Thematic ETFs: Hype, Hopes, and Real Returns
Thematic ETFs have exploded across Europe. In 2025 alone, European-listed thematic ETFs attracted over €24 billion in net inflows, according to Morningstar (source). Names like iShares Global Clean Energy UCITS ETF (INRG) and Lyxor MSCI Millennials ESG Trend Leaders UCITS ETF are pushed as “future-proof” bets for retail portfolios.
But let’s look at the scoreboard:
In the five years to January 2026, the average European thematic ETF delivered 3.1% annualised returns—less than half the MSCI World’s 7.2% and even trailing the Euro Stoxx 50’s 4.5%.
Why? Thematic ETFs usually pile into overvalued, crowded sectors after the easy money’s been made. By the time your local broker is hyping “AI Exposure,” you’re already late to the party. Fund providers rake in management fees and trading spreads; you get yesterday’s winners at tomorrow’s prices.
High Fees and Hidden Costs: The Silent Portfolio Killer
European investors love to complain about active fund fees, yet flock to thematic ETFs with expense ratios that make index trackers blush. The average ongoing charge for a European thematic ETF hovers around 0.55%—compare that to 0.10-0.20% for core MSCI World or S&P 500 UCITS ETFs.
Example: The L&G Cyber Security UCITS ETF (ISPY) charges 0.69% annually. Invest €50,000 over a decade, and you’re paying nearly €3,500 in fees—enough to buy a handful of the stocks outright. And that’s before trading spreads and potential underperformance.
According to Bloomberg, over 60% of European thematic ETFs lag their stated benchmark over rolling 3-year periods—while you pay more for the privilege.
When you factor in ongoing costs, underperformance, and the constant churn of “hot” themes, the odds are stacked against you. And let’s not even start on the tax drag from excessive turnover versus buy-and-hold index funds.
Sector Risk, Concentration, and the Opportunity Cost
By design, thematic ETFs are highly concentrated. The “clean energy” craze of 2021-2022 is a case in point. The iShares Global Clean Energy ETF (INRG) soared over 100% in 2020—only to crash 45% by the end of 2022 as EU subsidies waned and valuations collapsed. Many investors bought high and sold low. Sound familiar?
Worse, themes often translate to just a handful of stocks. Some so-called “blockchain” ETFs are over 40% weighted in five US tech names. That’s not diversification—it’s closet speculation dressed up as innovation.
Meanwhile, every euro you plough into a narrow play is a euro not compounding in global all-cap exposure. The core ETF investing playbook for European retail investors is simple: own the world, keep fees low, sleep well. Thematic bets are a distraction—at best a source of entertainment, at worst a drag on long-term wealth.
The Bottom Line
For most Europeans, thematic ETFs are a triumph of marketing over math: high fees, high risk, and poor results compared to broad index funds.
The Case for Thematic ETFs: When the Niche Play Works
To be fair, not every thematic ETF is a dud. Some have delivered monster returns for those who timed it perfectly. Luxembourg-based HAN-GINS Tech Megatrend Equal Weight UCITS ETF posted a 35% gain in 2023, riding the AI chip boom. And for ESG-driven investors, thematic funds provide targeted access to values-aligned sectors with a single trade.
There’s also a psychological argument: Thematics can keep novice investors engaged. If owning a “hydrogen economy” ETF keeps you from panic-selling your core holdings, consider it tuition for behavioral discipline.
But let’s be brutally honest: these successes are the exception, not the rule. For every AI ETF hero, there are five “Cannabis” or “Metaverse” ETFs languishing in the red. The survivorship bias is real—the headline-grabbing winners obscure a graveyard of flops.
Final Take: Don’t Chase Fads—Own the Market, Sprinkle Themes
Here’s where I stand: Are thematic ETFs worth it in Europe? Rarely, and only in moderation. If you must scratch the thematic itch, cap your exposure to 5-10% of your portfolio. Treat these funds as high-risk, high-fee “satellites”—not as core holdings. The boring global equity tracker will always do more for your wealth than a trendy basket of tomorrow’s supposed disruptors.
If you want excitement, go to a casino. If you want returns, stick with the world’s markets and ignore the marketing.
Prediction: By 2028, the majority of today’s European thematic ETFs will either merge, close, or radically reposition—leaving latecomers nursing losses. Don’t be one of them.
Disclaimer: This article reflects the author's opinion and is for educational purposes only. It does not constitute financial advice. Always do your own research before making investment decisions.