iShares MSCI South Korea ETF (EWY) Declines -19% Amid Memory-Semiconductor Pressures

Key Takeaways

• EWY declined roughly 19% over the last 30 days, falling from about $187 to near $151, as a global selloff in AI-linked memory semiconductors hit South Korea's export-driven equity market.
• The fund is also down about 13% over the trailing three months, with a late-summer recovery to near $192 largely erased by a sharp mid-October drawdown.
• Samsung Electronics and SK Hynix — together roughly 45% of the portfolio — were the dominant drags, pressured by AI capital-expenditure concerns and rising Chinese memory competition.
• Rising U.S. Treasury yields, sustained foreign capital outflows, and SK Hynix's decision to scrap a U.S. listing for its Solidigm unit compounded the selling pressure.
• Information technology accounts for roughly half of EWY's assets, making the ETF highly sensitive to the memory-semiconductor cycle.

EWY ETF Overview and Portfolio Exposure

EWY is a passively managed exchange-traded fund that seeks to track the MSCI Korea 25/50 Index, a free-float-adjusted, market-capitalization-weighted benchmark covering the large- and mid-cap segments of South Korea's equity market. The fund typically holds around 80–85 securities and carries a net expense ratio of 0.59%.

The portfolio is heavily concentrated in information technology, which accounts for roughly half of assets (approximately 47% to 53% depending on the reporting date). Industrials represent about 17% to 21%, and financials roughly 10% to 12%, with smaller positions in consumer discretionary, health care, and communication services. This structure means two memory-chip leaders dominate returns: Samsung Electronics at roughly 23% and SK Hynix near 20%, with smaller weightings in SK Square, Samsung Electro-Mechanics, KB Financial Group, and Hyundai Motor. Because Samsung and SK Hynix together approach 45% of the fund, EWY's performance is disproportionately tied to the global memory-semiconductor cycle and to sentiment around artificial intelligence infrastructure spending. I also checked this using Tickeron’s AI Screener to see how the holdings align with broader industry trends.

EWY Price Performance: Last 30 Days vs. Quarter

Over the last 30 days, EWY fell approximately 19%, sliding from about $187 to roughly $151. The decline was concentrated in a violent two-week stretch rather than a gradual drift, reflecting a broad rotation out of crowded AI-hardware positions.

The three-month picture is similarly negative but more nuanced. Measured from late July, EWY is down about 13%. The quarter was defined by two sharp drawdowns — one in late July and another in mid-October — separated by a recovery that carried the fund from near $144 to a peak around $192 in late September. That recovery has since been given back, leaving the fund in a volatile, trend-driven downtrend driven almost entirely by its semiconductor holdings.

Drivers Behind the Recent 30-Day Move in EWY

The most important catalyst was a global selloff in AI and memory-semiconductor stocks. Investors grew more concerned that the massive, debt-funded spending behind AI infrastructure buildouts may not translate quickly enough into profits. The tech-heavy Nasdaq and the Philadelphia Semiconductor Index posted their largest single-session declines since June, and South Korea's benchmark KOSPI index followed sharply lower as the rotation spread across Asia.

Competition from China added a second layer of pressure. ChangXin Memory Technologies (CXMT), a leading Chinese memory maker, announced advances in DRAM technology and plans to launch next-generation server products before year-end. The prospect of a narrowing technology gap raised fears that Samsung Electronics, SK Hynix, and U.S.-listed rival Micron (MU) could see market share and margins erode in 2027 and 2028.

Company-specific developments compounded the weakness. SK Hynix dropped plans for a U.S. listing of its flash-memory unit Solidigm, citing market volatility, and joined a list of AI-linked issuers withdrawing fundraising plans. Samsung Electronics reported strong preliminary third-quarter results — roughly 195 trillion won in sales and 10.74 trillion won in operating profit — but investors used the news to lock in gains amid worries the memory upcycle may be nearing a near-term peak.

Rising U.S. Treasury yields also weighed on high-valuation growth equities by raising discount rates, while foreign investors remained heavy net sellers of Korean stocks, with outflows concentrated in Samsung Electronics and SK Hynix shares.

Quarterly Performance Drivers for EWY

The broader three-month trend reflects a structural rotation out of AI-hardware names that had led markets through much of the year. After a late-July correction triggered in part by leveraged retail unwinding, EWY rallied through August and September as memory prices stayed firm and long-term supply agreements with cloud providers locked in demand. High-bandwidth memory (HBM) and server DRAM prices continued to rise, supporting record margins at Samsung and SK Hynix.

That rebound stalled in October as sentiment shifted. Concerns shifted from near-term supply tightness to the sustainability of the cycle: whether AI monetization could keep pace with capital spending, whether Chinese competition would erode pricing power, and whether elevated funding costs would slow AI buildouts. Comments from executives at NVIDIA (NVDA), Broadcom (AVGO), and Intel (INTC) highlighting capital constraints as a potential brake on AI growth reinforced the de-rating. Institutional fund flows turned negative, and the recovery unwound, leaving EWY lower over the quarter despite the supportive memory-price backdrop.

Monitoring EWY With AI Tools

From what I see, tools like Tickeron’s AI Screener help cut through the noise when evaluating concentrated ETFs such as EWY. By layering technical indicators, fundamentals, and sector filters, it becomes easier to isolate the semiconductor names driving the moves and compare them against peers in real time.

EWY ETF Outlook: Factors to Watch

Several factors are likely to shape EWY's direction in the months ahead. First, memory-semiconductor fundamentals remain strong near-term, with DRAM and NAND contract prices projected to keep rising and HBM4 demand building, but investors will closely watch whether supply additions from China and major producers soften pricing into 2027 and 2028. Second, the path of U.S. interest rates and Treasury yields will continue to influence the valuation of the fund's high-growth technology holdings.

Corporate results from Samsung Electronics and SK Hynix will be pivotal, as will any evidence that AI monetization is catching up with infrastructure spending. Capital flows also matter: a sustained return of foreign investors to Korean equities could stabilize the market, while continued outflows would leave it vulnerable to further drawdowns. Finally, the Bank of Korea's policy stance, the Korean won, and developments around the country's corporate value-up and shareholder-return initiatives will shape the financial and industrial segments of the portfolio. Investors should monitor these themes without expecting the fund's heavy semiconductor concentration to diminish in the near term.

Using Tickeron AI Tools in Practice

I find Tickeron’s AI Screener particularly useful when tracking cyclical funds like EWY. It lets me scan for technical patterns, volatility metrics, and industry exposures in one place, which helps confirm whether the semiconductor-driven pressures seen recently are isolated or part of a wider rotation. This kind of systematic check supports a more measured view of the risks and opportunities ahead.

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Allana|Expert

Financial analyst and market blogger with expertise in equity research, fundamental analysis, and macroeconomic trends. I regularly publish coverage on individual stocks, ETFs, and sector developments — combining rigorous financial analysis with clear, engaging writing for a broad investment audience.

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