The iShares MSCI South Korea ETF (EWY) hit all-time highs on April 17, 2026 — one of the most dramatic round trips in country ETF history. In less than eight weeks, EWY went from suffering its worst monthly return since 2008 (-18.7% in March 2026, driven by the Iran war oil shock) to trading beyond its pre-war peak at record prices. The catalyst: Iran's reopening of the Strait of Hormuz, oil falling 13% in a single session, and the ongoing AI semiconductor earnings cycle accelerating simultaneously.

The story of EWY in 2026 is the story of two converging forces — a macro shock that compressed valuations to multi-year lows, and a structural technology earnings cycle that had nothing to do with the Middle East. Understanding which force was dominant at each stage defines the entire analytical framework for the ETF.

What Is the iShares MSCI South Korea ETF (EWY)?

The iShares MSCI South Korea ETF (EWY) tracks the MSCI Korea Index, a free-float-adjusted market-cap-weighted index of large and mid-cap Korean equities. It is the largest and most liquid US-listed vehicle for Korean equity exposure, with $19.6 billion in assets under management as of April 2026.

Key Facts

EWY Performance Snapshot

EWY's 2026 performance profile is unlike any prior year in the ETF's history — a war-driven trough followed by a record-high recovery, all within a single quarter:

The January and February 2026 gains — driven by AI semiconductor demand for Samsung's HBM4 memory and SK Hynix's Nvidia supply agreements — were built before the war started. March's -16.6% reflected the energy import shock. April's +20.7% recovery brought EWY to all-time highs as Hormuz reopened. The net result since the war's February 27 start: -0.85% — a near-perfect round trip.

Top Holdings and Portfolio Structure

EWY's 86-stock portfolio is heavily concentrated in two positions that together represent more than 44% of the fund:

Samsung Electronics and SK Hynix — at a combined 44.4% of the portfolio — make EWY one of the most concentrated country ETFs relative to its sector exposure. The fund is effectively a leveraged expression of the global AI semiconductor supply chain. When Nvidia, AMD and major hyperscalers ramp AI data centre spending, Samsung and SK Hynix capture the HBM memory and advanced NAND demand that results. When global macro conditions deteriorate — as they did during the Iran war oil shock — the concentration amplifies the drawdown.

Market Drivers

AI Semiconductor Cycle: The dominant driver of EWY in 2026 is the HBM (High Bandwidth Memory) demand cycle. TSMC's Q1 2026 earnings confirmed AI data centre revenue accelerating beyond consensus, with HBM4 shipments growing faster than any prior memory technology transition. Samsung and SK Hynix are the two primary suppliers of HBM to Nvidia's H200 and B200 GPUs. As long as AI capex continues to expand — Polymarket prices a US recession at only 25.5% — this fundamental tailwind remains intact.

Iran War and Hormuz: Korea imports approximately 98% of its energy. When the Strait of Hormuz was blockaded from late February to April 17, 2026, the direct energy cost shock to Korean industrial margins was severe — POSCO, LG Chem and Samsung SDI all faced input cost pressure. The reopening of Hormuz on April 17 removed this headwind overnight, contributing directly to EWY's +4.6% single-session gain on that date and its subsequent all-time high.

Currency (KRW/USD): The Korean won strengthened during the ceasefire period as risk appetite recovered. A stronger KRW is positive for EWY's USD-denominated NAV and reduces the inflation pass-through from imported energy costs.

Valuation Anomaly: At 7.08x forward P/E — a 58.6% discount to the MSCI ACWI — EWY trades at one of the lowest multiples of any major equity market globally. This discount has persisted for years (the "Korea discount") due to corporate governance concerns, the complexity of the chaebol structure and geopolitical risk related to North Korea. As of April 2026, the war-period geopolitical risk has partially resolved, yet the valuation discount remains extreme.

Valuation: Is EWY Cheap or Expensive?

At 7.08x forward P/E, EWY is the second-cheapest major country ETF in the world after Turkey (TUR at 6.65x). The discount to the MSCI ACWI (17.12x) is 58.6 percentage points — a level that historically has been associated with above-average 12-month forward returns when macro conditions stabilize.

The counter-argument to the valuation case is structural: the Korea discount reflects genuine governance frictions. Samsung's complex cross-shareholding structure, the chaebol system's related-party transactions and the historically low dividend payout ratios all justify a discount to developed market peers. However, a 58.6% discount implies the market prices Korean equities as if their earnings are roughly worth half of equivalent earnings in developed markets — a degree of pessimism that is difficult to sustain when Samsung and SK Hynix are dominating the most important technology supply chain of the decade.

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

Seasonality Patterns

EWY's monthly seasonality from 20 years of price data:

The current position in the calendar (late April) sits at the end of EWY's seasonally strongest window — March and April average +2.64% and +3.04% respectively with 70% and 65% win rates. The transition into May brings historically weak seasonality (-0.14% avg, 47% win rate). The next seasonal tailwind after the summer emerges in July (+1.83%, 55% win rate). The full seasonality chart is at countryetftracker.com/seasonality.

Comparable ETFs

EWY is by far the cheapest of the major Asian country ETFs on a forward earnings basis — 7.08x versus Taiwan's 17.58x and India's 18.78x. The valuation gap between Korea and India (2.65x versus 18.78x) is 11.7 percentage points in P/E multiple — the widest among any two major comparable Asian economies. The comparison to Taiwan is particularly striking given that both markets are dominated by semiconductor companies: TSMC at 17.58x forward P/E versus Samsung and SK Hynix at an effective 7.08x.

Key Risks

Geopolitical re-escalation. A return to Hormuz blockade, or any other Middle East escalation that spikes oil above $100, disproportionately affects EWY given Korea's 98% energy import dependence. Polymarket currently assigns 32.5% probability to normal Hormuz traffic by April 30 — the physical normalization remains incomplete despite the deal framework.

North Korea. The structural geopolitical risk that has sustained the Korea discount for decades. Any escalation on the Korean peninsula could trigger a sharp EWY drawdown independent of global macro conditions.

Semiconductor cycle rotation. If AI capex growth decelerates — as it has done periodically in prior technology cycles — Samsung and SK Hynix earnings would compress, removing EWY's primary fundamental catalyst. At 44.4% combined portfolio weight, the ETF has no diversification buffer against this scenario.

May seasonality. Historically the weakest month for EWY (47% win rate, -0.14% avg), May follows the strongest seasonal window. With the ceasefire trade largely priced in and the peace deal process ongoing but uncertain (39.5% probability by April 30 per Polymarket), near-term consolidation is the base case.

Bottom Line

The iShares MSCI South Korea ETF (EWY) is simultaneously the cheapest major equity market in the world at 7.08x forward P/E and the most volatile country ETF in 2026 — a -16.6% March followed by a +20.7% April, with an all-time high on April 17. The structural tension between extreme cheapness and structural governance discount has not resolved. What has changed is the macro overlay: the Iran war headwind is largely removed, AI semiconductor earnings are accelerating, and EWY now trades at record prices while remaining at a 58.6% valuation discount to the world.

The risk entering May is that the seasonal tailwind ends, peace deal uncertainty remains elevated (only 39.5% by April 30), and the AI semiconductor earnings cycle enters a post-peak consolidation phase. EWY's next major catalyst after seasonality exhaustion will be Samsung's Q2 earnings guidance and the formal structure of the US-Iran deal.

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

Frequently Asked Questions

What does EWY track?

The iShares MSCI South Korea ETF (EWY) tracks the MSCI Korea Index — a free-float-adjusted, market-cap-weighted index of large and mid-cap Korean equities. The index currently contains 86 constituents. Samsung Electronics (23.3%) and SK Hynix (21.1%) together represent approximately 44.4% of the fund.

Why is EWY so cheap at 7.08x forward P/E?

The "Korea discount" reflects a combination of factors: complex chaebol cross-shareholding structures, historically low dividend payout ratios relative to earnings, corporate governance concerns, and ongoing geopolitical risk from North Korea. These factors have sustained a persistent valuation discount to global peers for decades. The discount widened further during the 2026 Iran war period and has not fully compressed despite the record-high price.

What happened to EWY during the Iran war?

EWY fell approximately 18.7% in March 2026 as the Strait of Hormuz blockade raised energy import costs for Korea's industrial base. Samsung SDI, LG Chem and POSCO faced direct margin compression. The subsequent ceasefire (April 7) and Hormuz reopening (April 17) drove a full recovery and new all-time high. From the war start (February 27) to April 20, EWY is -0.85% — a near-perfect round trip.

Is EWY a good ETF for AI exposure?

EWY provides indirect AI semiconductor supply chain exposure through Samsung Electronics (23.3% weight) and SK Hynix (21.1% weight) — the two dominant suppliers of High Bandwidth Memory (HBM) to Nvidia's AI GPU platforms. The exposure is more concentrated in the memory component of the AI supply chain than in the logic/foundry component (which would be captured more directly by EWT via TSMC). EWY at 7.08x P/E provides this exposure at a significant valuation discount compared to direct US-listed semiconductor ETFs.