The iShares MSCI Taiwan ETF (EWT) is on pace for its largest single-month return since April 2009 — a rally of approximately 28% month-to-date that has pushed the fund to all-time highs and made it the best-performing major country ETF in the world over the Iran war period (February 27 to April 27, 2026).

This is not a routine emerging market bounce. It is the simultaneous resolution of two independent forces that were both suppressing Taiwan's equity market — a geopolitical oil shock that has now ended, and a technology earnings cycle that was always accelerating underneath it. When both catalysts resolved in the same month, the result was a move that has occurred only once before in EWT's history.

What Is the iShares MSCI Taiwan ETF (EWT)?

The iShares MSCI Taiwan ETF (EWT) tracks the MSCI Taiwan 25/50 Index — a free-float-adjusted, market-cap-weighted index of Taiwanese large and mid-cap equities, with the 25/50 concentration constraint applied. With $8.95 billion in assets under management, EWT is the primary US-listed vehicle for Taiwanese equity exposure and, structurally, one of the most concentrated technology bets available in country ETF form.

Key Facts

The Rally in Context: April 2026 vs. April 2009

EWT's April 2026 performance is on track to be the largest single-month return in the fund's post-2006 history. The only comparable precedent is April 2009, when EWT gained +22.30% as global markets rebounded from the financial crisis trough. The current April 2026 return of approximately 28% — confirmed by the fund's own historical data showing April 2026 as the largest monthly observation in the dataset — surpasses that record by approximately 6 percentage points.

All April returns for EWT, ranked by magnitude:

The distribution is wide — April has produced both the best and worst returns in EWT's history. The 2022 and 2016 Aprils were deeply negative; 2009 and now 2026 have been explosively positive. The unifying factor: April captures TSMC's Q4/Q1 earnings cycle, which creates the highest annual information density for Taiwan's equity market in a single month.

Since the Iran war's start on February 27, EWT has gained +15.14% — the strongest performance of any major country ETF in the database across the full war-to-resolution period, outperforming even Saudi Arabia (KSA, +4.95%) and South Korea (EWY, +3.26%) from the same base.

Top Holdings: The TSMC-Dominated Portfolio

EWT's 89-stock portfolio contains one position that defines the fund's character:

The top three holdings — TSMC (21.25%), Hon Hai (5.69%) and MediaTek (5.05%) — collectively represent 32% of EWT and are all direct participants in the AI infrastructure build-out. TSMC manufactures the most advanced chips in the world; Hon Hai assembles the servers that run them; MediaTek designs the application processors. EWT is not a country ETF with technology exposure — it is the world's AI semiconductor supply chain packaged as a country ETF, with Taiwanese domestic financials and industrials providing the remaining diversification.

The significance of ASE Technology (3711.TW, 2.76%) is underappreciated. ASE is the world's largest independent provider of semiconductor packaging and testing services — the final manufacturing step before chips ship to data centres. As TSMC advanced nodes (3nm, 2nm) require increasingly sophisticated packaging (CoWoS, SoIC), ASE's revenue scales proportionally with TSMC's output growth. It is, in effect, TSMC's downstream revenue capture that doesn't appear in TSMC's own financials.

The Three Forces Behind the April 2026 Surge

1. TSMC Q1 2026 Earnings: AI Demand Acceleration

TSMC's Q1 2026 earnings confirmed that AI data centre revenue was accelerating beyond consensus. The company's advanced node capacity — 3nm and 2nm production — was running at full utilization with multi-year forward commitments from Nvidia, AMD and Apple. AI server deployments, which had been the primary demand driver since 2023, showed no signs of deceleration despite elevated capex levels. HBM memory demand (captured in EWY via Samsung and SK Hynix) and logic chip demand (captured in EWT via TSMC) are the two sides of the same AI infrastructure coin — April 2026 confirmed both are growing faster than the market had modeled.

The specific datapoint that drove the most pronounced market reaction: TSMC's CoWoS advanced packaging capacity — used to combine TSMC logic chips with HBM memory in Nvidia's H200 and B200 GPUs — was sold out through 2027 at the time of the Q1 report. This is the tightest supply constraint in the AI semiconductor supply chain, and Taiwan (via TSMC and ASE) is the only place it can be resolved.

2. Iran War Resolution: Removing the Energy Headwind

Taiwan imports approximately 98% of its energy — nearly identical to South Korea's dependence profile. The Strait of Hormuz blockade from late February to April 17 created a direct energy cost headwind for Taiwanese industry. Taiwan's petrochemical sector (Formosa Plastics group), its steel producers and its semiconductor fabrication plants — which consume enormous quantities of electricity and specialty gases — all face elevated operating costs when energy prices spike.

The Hormuz reopening on April 17, followed by oil falling 13% in a single session, removed this headwind simultaneously. The timing coincided with TSMC's earnings release window, creating a dual positive catalyst in the same 10-day period. The energy headwind's removal is less significant for EWT than for EWY (Korea's industrial base has higher direct energy intensity than Taiwan's semiconductor-focused economy), but it contributed to the positioning squeeze that amplified the move.

3. Positioning Squeeze and Underinvestment

Institutional investors had reduced Taiwan exposure during the war period, rotating toward defensive assets and energy exporters. EWT's relatively modest -5.22% return in March 2026 (the worst war month for energy importers) reflected both genuine energy cost concerns and institutional de-risking. As the ceasefire was announced on April 7 and the Hormuz reopening on April 17 confirmed the thesis, positioning reversed rapidly. The combination of underinvestment, TSMC's earnings beat, and the macro headwind removal created a forced-chase dynamic that amplified the fundamental repricing into the largest monthly move in 17 years.

Why Taiwan Defied the Energy Importer Thesis in the War Period

A central analytical puzzle from the February-April war cycle: Taiwan is a 98% energy importer — comparable to South Korea — yet EWT gained +15.14% since the war's start while many energy importer ETFs fell sharply in March.

The resolution is sector structure. Taiwan's economy is dominated by a semiconductor manufacturing complex that has structural pricing power independent of short-term energy costs. When TSMC announces its quarterly results showing 100% advanced node utilization with a two-year order backlog from the world's largest technology companies, the market prices TSMC's earnings power on that forward visibility — not on the current month's electricity bill. The energy cost increase was real but small relative to TSMC's revenue upside from AI demand.

South Korea (EWY) fell more sharply during the war period for the opposite reason: Samsung's memory business is more commoditized, and its energy intensity relative to revenue is higher. Korea's industrial base (steel, chemicals, shipbuilding) has direct energy pass-through cost that compresses margins in real time. Taiwan's semiconductor margin structure is more insulated.

This is the structural explanation for why EWT outperformed EWY during the war period despite identical energy import dependence — and why it continued to outperform even after the ceasefire, as TSMC's AI earnings remained the dominant price driver.

Performance vs. Peers Since February 27

Source: CountryETFTracker IranWar period. Base: Feb 27, 2026. Current: Apr 27, 2026.

EWT's +15.14% over the full war cycle is more than 3x the ACWI's return and nearly 2x ENOR — the leading energy exporter. It is the clearest empirical demonstration that in 2026, AI semiconductor earnings power was a stronger return driver than energy exporter commodity exposure.

Valuation: Is EWT Expensive After a 28% April?

At 17.58x forward P/E, EWT now trades at a 2.69% premium to the MSCI ACWI (17.12x) — one of the very few emerging market country ETFs to trade at a premium to the global benchmark.

Taiwan at 17.58x is not cheap in absolute terms — it trades near the global benchmark multiple after a 28% monthly gain. The valuation case rests entirely on whether TSMC's earnings trajectory justifies the multiple. If AI capex from hyperscalers continues at current rates and TSMC's advanced node utilization stays above 95%, the forward P/E compresses as earnings grow faster than price. If the AI capex cycle pauses, the 17.58x multiple is the vulnerability.

The comparison to South Korea (EWY at 7.08x) is striking: two markets that are both dominated by AI semiconductor companies, adjacent in geography, with similar energy import profiles — trading at a 2.5x P/E multiple divergence. Some of that gap is structural (TSMC's monopoly position versus Samsung's competitive memory market) and some reflects the residual Korea discount. The gap is unusually wide even accounting for structural differences.

The full valuation comparison is at countryetftracker.com/valuation.

Seasonality: Where April Fits in EWT's Calendar

EWT's monthly seasonality from 20 years of price data (ticker EWT, verified):

April's historical average of +2.69% with a 55% win rate is the highest average monthly return in EWT's calendar — but the wide distribution (from -9.1% in 2022 to +22.8% in 2026) reflects that April is TSMC's primary earnings catalyst month, producing the highest variance of any month rather than the most consistent returns. The +28% of 2026 is an outlier even by April's volatile standards.

What the seasonality data reveals most clearly: EWT has no sharply negative seasonal months. The worst average month is July (-0.46%, 50% win rate) — a modest negative compared to the -2.76% Junes of India and Norway, or the -3.01% June of Germany. This reflects TSMC's structural demand non-cyclicality: data centre AI spending does not follow a monthly seasonal pattern.

The next seasonally notable month after April is October (+0.46% avg, 70% win rate) — the highest win rate of any EWT month, driven by TSMC's Q3 earnings releases and post-Golden Week capital re-entry.

Correlation Structure: EWT's Relationships

EWT's correlations from the live database reveal the fund's positioning characteristics:

Highest correlations (3-month):

• vs EWY (South Korea): 0.86 — the tightest relationship in the universe, reflecting the AI semiconductor supply chain linkage
• vs EWN (Netherlands): 0.80 — ASML, which supplies EUV lithography equipment to TSMC, drives this correlation
• vs SPY: 0.79 — Taiwan's equity market has become increasingly co-dependent with US technology valuations
• vs EWG: 0.79 — European industrial technology companies with Taiwan supply chain exposure

Lowest correlations (5-year):

• vs TUR (Turkey): 0.20 — near-zero correlation, maximum diversification
• vs QAT (Qatar): 0.29 — Gulf oil economies have minimal overlap with Taiwan's semiconductor complex
• vs ENOR (Norway): 0.22 (3-month) — the oil/energy exporter relationship is structurally uncorrelated with AI semiconductors

The EWT-EWY correlation of 0.86 over 3 months is the highest bilateral correlation between any two major country ETFs in the database. This reflects the increasingly integrated AI semiconductor supply chain: TSMC makes the logic chips, Samsung and SK Hynix make the HBM memory, and both are indispensable components of every Nvidia GPU. What moves TSMC tends to move Samsung, and vice versa. For portfolio construction purposes, holding both EWT and EWY provides far less diversification than the geography suggests.

Macro Backdrop: What Polymarket Says for Taiwan's Key Variables

Prediction market probabilities as of April 27, 2026, relevant to EWT's risk framework:

Iran deal progress (the primary macro variable):

• End of military operations by June 30: Yes 59.5% — the majority scenario, removes residual energy risk
• End of military operations by May 31: Yes 35.5% — near-term formal resolution less likely
• Hormuz normal by April 30: Yes 0.35% — fully resolved as a live risk
• Iran uranium surrender by June 30: Yes 22.5% — nuclear resolution still a tail risk

US macro (the AI capex driver):

• US recession by end-2026: Yes 25.5% — recession would severely compress AI capex and TSMC demand
• Fed rate hike in 2026: Yes 14.5% — low, supportive for growth asset valuations

The critical Polymarket variable for EWT is the US recession probability. At 25.5%, it is the market's acknowledgment that if the AI capex cycle turns — whether from recession, regulation, or earnings disappointment — TSMC's forward earnings visibility compresses and EWT's 17.58x multiple becomes difficult to sustain. The 74.5% probability of no recession is EWT's structural support.

Key Risks After a 28% Month

Valuation after the move. EWT at 17.58x forward P/E has no margin of safety against earnings disappointment. A single quarter of TSMC demand guidance below consensus would compress the multiple with no valuation floor below the current price.

AI capex concentration. EWT's performance is ultimately dependent on three or four hyperscaler companies (Microsoft, Google, Amazon, Meta) continuing to expand AI data centre capex at current rates. Hyperscaler earnings in Q2 2026 — released in July — will be the next major test of this assumption.

ASML and equipment access. The US government's restrictions on advanced semiconductor equipment exports to China create an indirect risk for TSMC: ASML (the EUV lithography monopoly) is based in the Netherlands and subject to Dutch export control law. Any tightening of restrictions on TSMC's equipment access — however unlikely given TSMC's role as a US strategic ally — would compress long-term capacity expansion.

Geographic risk. Taiwan's proximity to China creates a structural geopolitical risk premium that has not been systematically priced into EWT since the 2022 Pelosi visit. Any escalation in cross-strait tensions — independent of the Iran war resolution — could create a rapid drawdown not captured by current valuation models.

May-June seasonality. EWT's May and June average returns (+0.98% and +1.08%) are modest and below April's historical average. After a +28% April, the base effect and exhaustion of near-term catalysts creates a period of likely consolidation.

Comparable ETFs

EWT is the cheapest AI semiconductor exposure available in ETF form on a forward P/E basis — 17.58x versus US semiconductor ETFs (SOXX, SMH) at 27-28x. The US semiconductor ETFs' advantage is deeper liquidity and broader holdings, but they also include non-AI semiconductor companies (analog, auto, industrial) that dilute the pure-play AI exposure. EWT's concentration in TSMC (21.25%) and its supply chain provides a cleaner — and historically cheaper — expression of the same fundamental trend.

Track EWT performance in real time at countryetftracker.com/country-detail?ticker=EWT.

Frequently Asked Questions

Why is EWT's April 2026 rally historically significant?

April 2026 is on track to be EWT's largest single-month return since the fund began tracking in 2001 — surpassing the previous record of +22.30% set in April 2009 during the global financial crisis recovery. The 2009 rally reflected the normalization of global risk appetite after the worst financial crisis in 80 years. The 2026 rally reflects a different mechanism: the convergence of AI semiconductor earnings acceleration with the resolution of a geopolitical oil shock that had temporarily suppressed Taiwan's equity market.

What percentage of EWT is TSMC?

TSMC (2330.TW) constitutes 21.25% of EWT's portfolio — the largest single-stock weight in any major country ETF's index. This concentration means EWT's returns have a structural correlation to TSMC's earnings trajectory. When TSMC outperforms — as in Q1 2026 with AI demand beating consensus — EWT amplifies. When TSMC underperforms (as in 2022, when EWT fell -9.1% in April amid chip cycle downturn fears), EWT is disproportionately affected.

How does EWT compare to buying TSMC directly (ADR: TSM)?

TSMC's US-listed ADR (TSM) provides direct, pure-play exposure to TSMC's earnings with no diversification. EWT provides TSMC exposure (21.25%) plus Hon Hai, MediaTek, ASE Technology and 85 other Taiwanese companies. The EWT approach is less volatile (broader portfolio), lower expense for what is essentially a diversified tech fund, and captures the full Taiwan semiconductor supply chain — including ASE's packaging services and MediaTek's chip design. TSM is appropriate for investors wanting maximum TSMC concentration; EWT is appropriate for investors wanting Taiwan semiconductor supply chain exposure with 80% less single-stock risk.

Is EWT overvalued after a 28% April rally?

At 17.58x forward P/E — a slight 2.69% premium to the MSCI ACWI — EWT is not expensive in absolute terms for a market dominated by TSMC's earnings quality. However, it offers no valuation discount after the April move; the entire return case depends on TSMC's AI earnings continuing to grow into the multiple. The margin of safety is narrow. A recession (25.5% probability per Polymarket), an AI capex pause, or a TSMC-specific operational issue would all create significant drawdown from current levels without a valuation floor to cushion.

What is EWT's dividend yield?

EWT yields approximately 3.20% as of April 27, 2026, with the most recent dividend of $2.816 per share. The yield is primarily driven by TSMC's dividend policy and the dividends distributed by Taiwanese financial holdings (CTBC Financial at 1.49% weight). At 3.20%, EWT's yield is competitive with many fixed-income instruments and provides a meaningful income return alongside the capital appreciation thesis.