South Korea's iShares MSCI South Korea ETF (EWY) is the undisputed story of 2026: +91.75% year-to-date, driven entirely by SK Hynix and Samsung's position at the center of the AI chip memory supply chain. The thesis is simple — a handful of semiconductor stocks moved, and the country ETF moved with them. In Europe, a structurally identical dynamic is playing out — at smaller scale but with the same analytical logic. The iShares MSCI Netherlands ETF (EWN) is the 6th best-performing country ETF in the world this year, the 2nd best in Europe behind oil-driven Norway. Four AI semiconductor stocks explain 92% of EWN's entire 2026 return.

The Netherlands has become the South Korea of Europe.

The Numbers

EWN's +14.09% since April 1 is the second-highest 7-week return of any country ETF, trailing only EWY's +47.69% over the same window. Among European markets, it is in a separate category — France (EWQ) is up +1.1% YTD, Germany (EWG) +1.3%, and the broad Euro Stoxx index (FEZ) +4.8%. EWN is outperforming the European average by over 12 percentage points.

The Global Leaderboard: EWN's Exact Position

EWN is outperforming the MSCI ACWI by over 7 percentage points YTD — and outperforming every other major European country ETF by a wide margin. The second-best European performer (Norway) is driven by energy prices. EWN's outperformance is driven by AI.

The Four Stocks That Explain Everything

The iShares MSCI Netherlands ETF (EWN) holds 58 securities with $503.9 million in AUM. Its top 10 positions represent approximately 55% of fund weight. But the analytical story is far more concentrated than even that suggests: four AI semiconductor and infrastructure stocks explain the entire rally.

EWN has returned +17.17% YTD. These four stocks contributed +15.84% — 92.2% of the entire fund's return. The remaining 54 holdings in the portfolio collectively contributed less than 2 percentage points. EWN is, functionally, a four-stock AI semiconductor basket dressed as a country ETF.

Key Facts

ASML: The EUV Monopoly at 23.67%

ASML Holding N.V. is the most important non-TSMC company in the global semiconductor supply chain. It manufactures the Extreme Ultraviolet (EUV) lithography machines that semiconductor fabs — including TSMC — use to print chips at sub-7nm process nodes. No alternative supplier exists. Every advanced chip produced by TSMC, Samsung, and Intel uses an ASML machine.

ASML's 2026 trajectory has been defined by a single data point: the acceleration of AI-driven chip demand pulling forward its entire order book. Q1 2026 earnings beat consensus, and management raised the full-year 2026 outlook, citing customers' "strong belief that the AI demand is real." The stock hit a $500 billion market capitalisation milestone in January 2026 — a threshold previously reached by only a handful of global companies. Morgan Stanley has forecast earnings doubling in 2027, with a price target implying a further 70% upside from January levels.

ASML at 23.67% of EWN is the structural anchor of the fund — just as TSMC at 19% anchors EWT. The analytical parallel is explicit: both are irreplaceable monopoly suppliers at different layers of the AI chip stack. TSMC makes the chips; ASML makes the only machines capable of printing the most advanced chips.

Nebius: The $27 Billion Meta Deal That Transformed EWN

Nebius Group N.V. (NBIS) is the least understood — and most explosive — component of EWN's 2026 story. A former subsidiary of Russia's Yandex, Nebius was restructured and listed on Nasdaq in late 2024 as a pure-play AI cloud infrastructure company, domiciled in Amsterdam. It builds AI-focused GPU data centres — "AI factories" — designed to provide GPU compute at scale to European enterprises.

On March 16, 2026, CNBC reported that Meta had signed a $27 billion infrastructure deal with Nebius — $12 billion in committed spending plus up to $15 billion in additional capacity options. The announcement sent NBIS up 14% in a single session. Year-to-date, Nebius has gained +162.74% — making it the best-performing stock in the EWN portfolio by a substantial margin, and one of the best-performing large-cap AI stocks globally in 2026.

Nebius at 4.17% of EWN contributed +309 basis points to the fund's YTD return despite being the fourth-largest position. Its +162% return punches far above its weight. Critically, the Meta deal provides a multi-year revenue backlog that makes Nebius's growth trajectory unusually visible — a quality the market is pricing at an aggressive multiple.

ASM International and BESI: The Semiconductor Equipment Depth

ASM International (ASM.AS) manufactures atomic layer deposition (ALD) equipment — the process used to deposit ultra-thin films of material onto semiconductor wafers during advanced chip fabrication. At 4.55% of EWN, ASM has gained +67.96% YTD as its order book has expanded with TSMC's capacity buildout.

BE Semiconductor Industries (BESI.AS) manufactures hybrid bonding and advanced die attach equipment — critical for the chip packaging step that bonds TSMC's logic dies to HBM memory stacks in AI GPU packages. The CoWoS packaging process that powers Nvidia's B200 and B300 GPUs requires BESI's equipment. At 2.56% of EWN, BESI has gained +103.44% YTD — more than doubling — as AI packaging demand has overwhelmed its production capacity.

Together, ASM and BESI represent the mid-stream of the semiconductor supply chain: between ASML's lithography machines (which print wafers) and TSMC's fabs (which produce finished chips). The Netherlands has quietly assembled the most complete semiconductor equipment cluster outside of Japan and the United States.

The Korea Parallel — How Exact Is It?

The structural analogy between EWN and EWY in 2026 is analytically precise across four dimensions:

1. Concentration: In EWY, Samsung + SK Hynix represent approximately 44% of the fund; in EWN, the four AI semiconductor stocks represent 34.95%. Both ETFs are dominated by a small number of companies in a single industry.

2. Single-theme driver: EWY's 2026 return is almost entirely explained by HBM memory demand for AI GPUs. EWN's 2026 return is almost entirely explained by AI chip equipment demand and AI cloud infrastructure.

3. Supply chain positioning: EWY captures the memory layer of the AI chip stack (HBM); EWN captures the equipment layer (ASML, ASM, BESI) and the cloud infrastructure layer (Nebius). They are complementary nodes in the same AI buildout supply chain.

4. The size difference: EWY is the dominant trade (+91.75% YTD), EWN is a smaller echo of the same logic (+17.17% YTD). The scale difference reflects the fact that ASML's monopoly — while structurally irreplaceable — is upstream of the production bottleneck that drove HBM to its most extreme re-rating.

The critical difference is valuation. EWY at 7.51x is one of the cheapest markets in the world; EWN at 19.59x — a +8.4% premium to the MSCI ACWI — is one of the most expensive in Europe. EWN's AI premium is already largely priced. EWY's AI premium is arguably still being discovered.

Valuation Context

Netherlands at 19.59x trades at a meaningful premium to every other major European market. France and Germany at 14.47-14.49x trade at roughly a 25% discount to EWN — reflecting the absence of any AI semiconductor concentration in their index compositions. The Netherlands premium is ASML. Remove ASML from the MSCI Netherlands Index and the market would trade at a discount to Europe, not a premium.

Seasonality Warning: June Is EWN's Worst Month

As EWN approaches June, the seasonality data delivers an unambiguous caution signal. June is historically the worst month in EWN's 20-year seasonal calendar by a considerable margin:

June has a 26.3% win rate over 19 years of data — positive in only 5 out of 19 historical Junes. The average June return of -2.26% is the worst of any month in EWN's calendar. 2026's strong May momentum going into June creates a setup where seasonal headwinds may cap near-term upside. July, by contrast, is EWN's strongest month (+2.73% avg, 65% win rate), suggesting any June weakness may recover in Q3.

The Broader Picture: Four Months of AI Equity Rotation

EWN's 2026 trajectory illustrates the defining global equity theme of the year: capital is flowing to wherever AI semiconductor exposure exists, regardless of geography. The global YTD leaderboard — Korea, Taiwan, Netherlands — is not a coincidence of economic cycles or geopolitical events. It is the same single thesis expressed in three different country wrappers:

• EWY → AI chip memory (HBM) supply chain
• EWT → AI chip foundry supply chain (TSMC)
• EWN → AI chip equipment + AI cloud infrastructure supply chain (ASML, Nebius, ASM, BESI)

The countries are secondary. The AI supply chain positioning is the primary driver. Netherlands — a country of 18 million people and no domestic AI end market to speak of — has become a top-5 global equity performer because its four key listed companies are structurally embedded in the most capital-intensive buildout in modern industrial history.

Track EWN and all country ETF performance at countryetftracker.com. Full valuation analysis at countryetftracker.com/valuation. Compare EWN vs EWY and EWT at countryetftracker.com/compare.

Frequently Asked Questions

Why is EWN the best-performing European country ETF (ex-Norway) in 2026?

EWN's outperformance is driven entirely by four AI semiconductor and infrastructure stocks that together represent 34.95% of the fund: ASML Holding (+46.51% YTD, 23.67% weight), Nebius Group (+162.74%, 4.17%), ASM International (+67.96%, 4.55%), and BE Semiconductor (+103.44%, 2.56%). These four stocks contributed +1,584 basis points — approximately 92% of EWN's entire +17.17% YTD return. The remaining 54 holdings collectively contributed less than 2 percentage points. EWN is functionally a four-stock AI semiconductor basket.

What is the connection between EWN and South Korea's EWY?

Both ETFs are concentrated AI semiconductor plays where a small number of stocks explain the entire fund return. EWY is driven by HBM memory suppliers (SK Hynix and Samsung); EWN is driven by semiconductor equipment makers and AI cloud infrastructure (ASML, Nebius, ASM, BESI). They occupy different layers of the same AI chip supply chain — memory and equipment/cloud respectively. The key difference: EWY at 7.51x forward P/E is significantly cheaper than EWN at 19.59x, reflecting different market perceptions of the addressable opportunity and monopoly strength of each cluster.

What drove Nebius Group's +162% YTD return?

Nebius Group (NBIS) is an Amsterdam-domiciled AI cloud infrastructure company that builds GPU data centres. The stock surged following a $27 billion infrastructure deal with Meta announced in March 2026 — $12 billion committed plus up to $15 billion in capacity options. The deal provides Nebius with a multi-year revenue backlog and validates its position as a critical European AI infrastructure provider. Nebius at 4.17% of EWN contributed +309 basis points to the fund's 2026 return despite being a mid-sized position by weight.