The stock market is supposed to be afraid of wars. Oil above $100 a barrel. A conflict in the Middle East that closed one of the world's most important shipping lanes. Hyperscalers burning hundreds of billions on AI infrastructure with no guarantee of return. Any one of those things, in a different year, might have been enough to send investors running for cover.
Instead, April ended with US equities at their highest levels ever. By April 30, the S&P 500 had crossed 7,200 for the first time - and according to Bloomberg, the index notched a 10% monthly gain, its biggest since November 2020. The Nasdaq hit new records alongside it. April turned out to be the strongest month for US stocks in more than five years.
Across the Atlantic, European investors were watching - and buying. Trading desks in Frankfurt reported high volumes and a clear skew toward purchases. The enthusiasm was concentrated in one direction: American technology.
The background
An ETF, or exchange-traded fund, is a basket of stocks or other assets that trades on a stock exchange like a single share. Instead of buying Apple or Nvidia individually, an investor can buy one ETF that holds a slice of dozens or hundreds of companies at once. The appeal is straightforward: instant diversification, low costs, and the ability to buy and sell throughout the day just like any stock.
The most common type tracks an index - a fixed list of companies ranked by size or sector. The S&P 500 is the 500 largest US companies by market value. The MSCI World includes around 1,500 large and mid-sized companies across 23 developed countries. The Nasdaq 100 is the 100 largest non-financial companies on the Nasdaq exchange, heavily weighted toward technology. When investors in Frankfurt buy a "Nasdaq ETF," they are effectively buying a small piece of every major US tech company at once - Meta, Alphabet, Microsoft, Amazon, Apple, Nvidia - through a single product.
This category of investing has grown at extraordinary speed. According to ETFGI, European ETF assets hit an all-time high of $3.22 trillion at the end of 2025, after recording $396.84 billion in net inflows across the year - the industry's 39th consecutive month of positive flows. The direction has not changed in 2026. According to Waystone, full-year European ETF inflows are forecast to reach $470 billion in 2026, up from $390 billion in 2025, reflecting a broader shift toward ETFs as core holdings in both retail and institutional portfolios.
The backdrop for all this buying is unusual. The US went to war with Iran in late February. Oil prices surged past $100 a barrel. Shipping through the Strait of Hormuz - the narrow waterway through which about 20% of the world's oil flows - was disrupted. And yet, as LSEG's Lipper Alpha reported, even as equities dipped in March under the weight of geopolitical pressure, ETF inflows never turned negative - and the first quarter of 2026 still marked a new quarterly record.
What is actually happening
At the Deutsche Borse in Frankfurt on April 28, trading desks reported exactly what the headline numbers suggested. Frank Mohr at Societe Generale described "high turnover and clearly dominant purchases." Holger Heinrich at Baader Bank reported a similar buying skew, though with slightly declining overall volume.
The products seeing the most demand were concentrated in US and US-heavy global strategies. iShares Core S&P 500 ETFs and MSCI World trackers were popular. Nasdaq-focused ETFs from BNP Paribas and UBS were described as "extremely popular." At Baader Bank, technology-oriented and growth-focused strategies continued to dominate.
The Nasdaq's new highs were the gravitational pull. According to Bloomberg, the S&P 500 gained 1% on April 30 and the Nasdaq also closed at a record, capping the best monthly performance for US stocks since 2020. That kind of momentum tends to attract more buying - a dynamic sometimes called performance chasing, where investors follow recent returns rather than underlying value.
Three specific ETFs hit new price highs on April 28: the MSCI World IT ETFs from Amundi and Xtrackers, and the Xtrackers Artificial Intelligence and Big Data ETF. The AI and Big Data fund targets companies involved in artificial intelligence infrastructure and data processing, rather than the broader technology sector. Its new high reflects a bigger pattern. According to State Street's March 2026 flash flows report, thematic ETFs accumulated nearly $1 billion in inflows in March alone, bringing their full-year total to $6 billion - their best start to any year since 2021, with Robotics and AI exposures accounting for 95% of all thematic inflows that month.
Not all European equity categories were moving in the same direction. Eurozone stocks - companies from the countries sharing the euro - were seeing net selling. European small caps had some demand, with focus on individual country plays in Italy and Germany. The overall picture was lopsided: US technology was absorbing the bulk of investor attention.
One genuine outlier: the Amundi Global Gender Equality ETF - which tracks companies with strong records on gender parity in leadership - saw notably high inflows on the day, an anomaly in an otherwise tech-dominated session.
The money trail
Follow the money and a pattern emerges that is both rational and slightly circular.
The US currently makes up around 71% of the MSCI World index. That matters because millions of European investors hold MSCI World ETFs as their core "diversified" holding - only to discover that roughly seven in ten euros are effectively invested in American companies. When the Nasdaq rises, those ETFs rise. When those ETFs rise, they attract more inflows. When inflows arrive, fund managers must buy more of the underlying stocks, pushing prices higher still.
This is not a flaw in the system exactly - but it is a feature that concentrates risk in ways that the word "world" in a fund's name does not communicate.
The growing demand for "ex-USA" ETFs - funds that deliberately exclude American companies - reflects a dawning recognition of that dynamic. New products like the Xtrackers FTSE All-World ex US and the Amundi MSCI World Ex USA Screened have recently launched to give investors meaningful non-US exposure. The FTSE All World index still allocates around 61% to the US, so "all world" is already doing a lot of work. The ex-USA versions at least make the exclusion explicit.
Who benefits from the current setup? The large ETF issuers collect management fees on every euro parked in their funds. According to ETFGI, iShares (owned by BlackRock) remains the largest ETF provider in Europe with $1.30 trillion under management and a 40.4% market share, followed by Amundi at $401 billion and Xtrackers at $336 billion - together the three control 63.3% of total European ETF assets. Every euro of fresh inflow means more fee income for firms already earning on a $3 trillion base.
The companies inside the funds benefit indirectly. Higher stock prices make it cheaper to raise capital, easier to issue stock as acquisition currency, and more attractive as employers offering equity compensation. A rising Nasdaq is not neutral - it flows wealth toward the shareholders of the companies it contains, which skews toward large institutional holders and wealthier retail investors.
The losers are less visible: investors in cash or bonds who watch equity markets pull ahead, savers in countries with low stock market participation, and smaller European companies competing for capital against US tech giants that command ever-larger slices of global index funds. As LSEG's Lipper Alpha noted in its March review, bond ETFs faced net outflows that month even as equity funds continued to attract capital - the rotation away from fixed income and toward equities is still running.
What people are doing about it
One structural response to US market dominance is the growing ex-USA ETF category. Several issuers have launched dedicated products to give investors genuine geographic diversification, with more in the pipeline. Whether those funds hold assets when the next Nasdaq record drops is the real test.
A more fundamental shift is happening in the product structure itself. For most of ETF history, "ETF" was synonymous with passive investing - tracking an index mechanically, with no human making buy-or-sell decisions. That is changing fast. According to QuotedData's analysis of State Street's 2026 ETF outlook, active strategies gathered more than $38 billion in inflows across Europe during 2025 and accounted for over 36% of new product launches. State Street predicts that 2026 will be the first year more active ETFs than passive ones are launched in Europe.
The distinction matters for fees and expectations. A passive ETF tracking the Nasdaq charges a tiny fraction of a percent per year - sometimes as little as 0.07%. An active ETF employs fund managers who make decisions about which stocks to hold and when to trade. Those managers charge more - typically between 0.3% and 0.75% per year for equity strategies - in exchange for the possibility of beating the index. According to QuotedData, active ETFs still represent only around 3% of European ETF assets. In the US, the figure is already above 11%.
According to ETF Express, the global ETF industry crossed $20 trillion in assets earlier this year, with Europe alone surpassing $3 trillion. Meanwhile, money market ETFs - which function like a low-risk savings account, parking cash in short-term government debt - were recording steady two-sided trading. As Societe Generale's Frank Mohr put it: "The music is clearly playing in the equities space." Bond ETFs, by contrast, were barely registering.
The bottom line
European investors are funnelling money into US technology with unusual conviction, even as a war drives oil prices above $100, earnings from the biggest tech companies send mixed signals, and valuation concerns quietly accumulate. The market's message, for now, is that none of that matters as much as the Nasdaq hitting new highs. What is harder to price in is the structural reality that "global diversification" through standard ETFs is, to a considerable degree, a bet on American tech companies - which is exactly what most investors buying these products think they are diversifying away from.
Timeline
- End of 2025 - European ETF industry reaches an all-time high of $3.22 trillion in assets, recording $396.84 billion in net inflows for the year, according to ETFGI.
- Late February 2026 - The US enters conflict with Iran, disrupting oil flows through the Strait of Hormuz and pushing crude above $100 a barrel, as confirmed by LSEG's Lipper Alpha.
- March 2026 - European ETF inflows slow from their January and February pace as geopolitical uncertainty increases, though Q1 2026 still marks a new quarterly inflow record. Thematic ETFs focused on Robotics and AI account for 95% of all thematic ETF inflows in the month, according to State Street's flash flows report.
- April 28, 2026 - Trading desks at Deutsche Borse report strong buying in US and tech ETFs. The MSCI World IT ETFs from Amundi and Xtrackers, along with the Xtrackers AI and Big Data ETF, hit new price highs. Demand for new ex-USA ETFs from Xtrackers and Amundi is noted.
- April 30, 2026 - The S&P 500 closes above 7,200 for the first time ever; the Nasdaq also posts a record close, according to Bloomberg. April is confirmed as the best month for US stocks since 2020.
- 2026 (full year forecast) - Active ETF launches are forecast to exceed passive ETF launches in Europe for the first time, and total European ETF inflows could reach $470 billion, according to QuotedData and Waystone.
Summary
Who: European retail and institutional investors, ETF issuers including iShares, Amundi, and Xtrackers, and trading desks at Societe Generale and Baader Bank at the Deutsche Borse in Frankfurt.
What: A surge in buying of US and technology-focused ETFs on European exchanges, concentrated in Nasdaq trackers and AI-themed funds, coinciding with new all-time highs in US equity indices and the market's best monthly performance since 2020.
When: Primarily April 28, 2026, in the context of a broader April rally confirmed by Bloomberg on April 30.
Where: European stock exchanges, principally Frankfurt's Xetra platform, with underlying assets concentrated in US-listed technology companies.
Why: New Nasdaq records are attracting momentum-driven buying from European investors seeking returns in a market that has continued to rise despite a Middle East conflict, rising oil prices, and mixed signals from major tech earnings - even as the "global" funds they are buying remain heavily concentrated in American stocks.