Korean Investors Flock to US Stocks Amid Domestic Market Woes

A significant wave of South Korean investors is redirecting capital to U.S. markets, a strategic move seemingly aimed at hedging against potential domestic market corrections, even as global institutional investors show increasing interest in Korean equities. Data from the Korea Exchange reveals that Korean retail investors were net sellers of domestic stocks for a considerable portion of the past week, despite the benchmark KOSPI index entering bullish territory. Concurrently, overseas investors adopted a net buying stance.

This shift in investor behavior presents a compelling narrative with several key dimensions:

In July, South Korean investors net purchased approximately $4.5 billion in U.S. equities. A notable segment of this investment, around $840 million, was directed towards the U.S.-listed American Depositary Receipts (ADRs) of semiconductor giant SK Hynix, according to data from the Korea Securities Depository. Intriguingly, SK Hynix ADRs ranked as the second most net-purchased U.S. securities by Korean investors, despite the direct availability of the company’s shares on domestic exchanges.

The U.S. ADRs have consistently traded at a premium compared to their Korean counterparts, a disparity that has recently hovered around 10%, according to Owen Lamont, senior vice president at Acadian Asset Management. Furthermore, these ADRs have demonstrated higher volatility. Lamont expressed bewilderment at this trend, stating, “There’s no rational reason for a Korean investor to purchase ADRs of Korean stocks in the U.S. market.” He posited that such price discrepancies are atypical and could serve as an indicator of speculative excess, likening them to similar market dislocations observed during the dot-com bubble involving Taiwanese and Indian companies, suggesting they are “a symptom of the bubble.”

The pursuit of amplified returns is evident in the composition of Korean investors’ U.S. portfolios. This month, a leveraged product, the ProShares Ultra QQQ ETF, secured the seventh position among the top 10 most popular U.S. stocks held by these investors. In July, the data from the Korea Securities Depository indicated that four of the top 10 net-purchased U.S. securities were leveraged products. Leading this cohort was the Direxion Daily Semiconductor Bull 3X Shares ETF (SOXL), which aims to deliver three times the daily performance of a semiconductor index. Following closely were the ProShares UltraPro QQQ and ProShares Ultra QQQ, ranking fourth and sixth, respectively, underscoring a clear appetite for amplified exposure to market movements.

A crucial observation is that while investors are shifting their geographical focus, their underlying investment themes may remain remarkably consistent. Phillip Wool, head of research at Rayliant Global Advisors, commented, “The irony is that if you parse the data and look at what they’re buying, it’s largely shares tied up in the same AI hardware theme that’s been selling off in the local market.”

Jung In Yun, founder of Fibonacci Asset Management, suggested that some traders who have incurred losses in Korean semiconductor stocks or leveraged ETFs might be reallocating capital to U.S. AI stocks, which they perceive as having superior quality or liquidity. “They are not necessarily reducing their exposure to the AI theme,” Yun explained. “They may simply be changing the geographical vehicle through which they express the same view.” This indicates a strategic diversification of execution rather than a fundamental shift in market outlook.

The $4.5 billion net purchase of U.S. stocks by Korean retail investors in July marked a significant acceleration from June and approached the $5 billion net purchases recorded in January. This outward flow contrasts sharply with recent domestic market dynamics. Following a spectacular rally that had drawn significant retail participation into semiconductor stocks and leveraged products, the Korean stock market experienced a substantial sell-off. This downturn preceded a modest rebound earlier this month.

Data from the Korea Financial Investment Association reveals a dramatic contraction in margin loan balances in the Korean stock market. These balances stood at approximately 37 trillion won ($26 billion) at the end of June, before plummeting to 27 trillion won earlier this month, reaching their lowest point of the year. While acknowledging that July’s U.S. purchases were substantial, Lamont noted their significance in the context of a declining domestic market: “it is still pretty interesting that they increased their U.S. buying even as the Korean market was plunging.”

The question of whether this influx of South Korean capital can exert a material impact on the volatility of the considerably larger U.S. market remains a subject of analysis. Wool expressed skepticism, arguing that while retail investors can wield considerable influence in the Korean market, the U.S. equity landscape is predominantly shaped by professional and institutional investors. Consequently, even substantial flows from Korean retail investors would represent a relatively small fraction of overall trading volume in the U.S.

Conversely, Lamont perceives a greater potential for market distortions within specific individual stocks and niche segments that are favored by retail traders. He cited the surge of Korean investors into U.S. “quantum” stocks in late 2024 as an example. Furthermore, Lamont suggested that the proliferation of leveraged ETFs across South Korea, Hong Kong, and the United States “is possibly adding volatility and magnifying market fluctuations,” indicating a broader trend of increased leverage amplifying market movements.