South Korean Stock Market Performance Amid Global AI Demand

The South Korean stock market has emerged as a notable area of momentum, with the iShares MSCI South Korea ETF (EWY) posting a gain of more than 31% over the past month [1]. This performance represents a return approximately five times higher than that of the S&P 500 during the same period [1].

Key takeaways

• The iShares MSCI South Korea ETF has risen over 101% year to date as of late May 2026 [1].
• Memory chip giants SK Hynix and Samsung are primary drivers of the market's growth due to high demand for high-performance memory chips [1].
• South Korean markets saw a 6.6% leap in the Kospi index following a recent pause in U.S. trade tariffs [3].
• Investors often weigh the "Korea discount," a reference to the complex, family-controlled corporate structures known as Chaebols [1].

The Role of Memory Chips and Industrial Growth

The surge in South Korean equities is largely attributed to the global AI boom, which has created overwhelming demand for storage and memory hardware [1]. SK Hynix and Samsung, identified as industry leaders in high-performance memory, are central to this trend [1]. Beyond these technology titans, the South Korean market includes industrial companies that are increasingly relevant to the development of physical AI and robotics, such as LG Electronics and Hyundai Motor [1].

While some analysts suggest that the "Chaebol" corporate structure justifies a valuation discount compared to U.S. firms, others argue that this complexity is less significant given the country's critical role in the AI supply chain [1]. This perspective contrasts with concerns regarding other international markets, such as Taiwan, where geopolitical uncertainty related to China is often cited as a reason for a steeper discount [1].

Market Volatility and Global Trade Policy

The recent performance of South Korean stocks occurs against a backdrop of significant volatility in the United States. U.S. markets have experienced sharp swings as the White House navigates a trade war, including fluctuating tariff rates on Chinese imports and subsequent retaliatory measures [3]. While the S&P 500 has faced pressure—at one point nearing a 20% decline from its record—international indexes in Europe and Asia, including South Korea’s Kospi, rallied following a temporary pause in U.S. tariffs [3].

Why it matters

The divergence between the momentum in the South Korean market and the volatility in U.S. stocks highlights the influence of the global AI supply chain on investor sentiment. As demand for memory and storage chips remains a bottleneck in the AI sector, South Korean firms are positioned as key beneficiaries [1]. However, the future direction of these markets remains unclear, as investors continue to monitor the impact of trade policies, potential recessionary threats, and the ongoing stability of the bond market, which remains sensitive to political and economic shifts [1, 3].