The South Korean stock market, once the world's hottest equity market, has taken a sharp turn into bear territory, leaving investors puzzled and concerned. This dramatic shift highlights the delicate balance between market enthusiasm and investor skepticism, particularly in the realm of artificial intelligence (AI).
The Kospi, South Korea's benchmark stock index, has shed more than 5% in a matter of weeks, bringing it 20% below its June 19 record high. This rapid decline is a stark reminder of the market's extreme dependence on AI, with chipmakers Samsung Electronics and SK Hynix dominating the index's composition. As of June, these two companies accounted for over half of the Kospi's weight, a situation that has both lifted and now sinks the index.
Manishi Raychaudhuri, CEO of Emmer Capital, attributes the drawdown to global investors' heightened skepticism about AI, coupled with extreme market concentration. Jung In Yun, founder of Fibonacci Asset Management Global, agrees, noting that Korean equities had become one of the most crowded AI trades globally after a strong rally. This positioning made it easy for investors to trigger profit-taking, leading to the recent correction.
The Kospi's volatility index has surged over 200% since the start of the year, indicating that swings of 5% to 10% are now commonplace. This volatility is partly attributed to the gamification of finance, where news flows and fads drive market behavior more than fundamentals. Peter Kim, head of research at KB Securities, supports this view, suggesting that modern markets are more susceptible to short-term gyrations due to retail fund flows, leveraged exchange-traded funds, and AI-driven concentration.
Despite the recent sell-off, the Kospi remains up more than 70% this year, having gained over 75% last year. This resilience is underpinned by strong earnings from companies like Samsung, which reported blockbuster profits in the second quarter. However, the market is questioning the pace of earnings growth rather than the sustainability of AI demand, leading to a valuation adjustment rather than the end of the AI cycle.
Rolf Bulk, head of semiconductors and infrastructure at Futurum Group, highlights the strong demand for memory chips, with prices rising between 50% and 80% sequentially in the second quarter. He believes that the fundamentals for memory makers remain intact, citing a multi-year supply shortage and long-term contracts with hyperscale customers. KB Securities' Kim agrees, suggesting that the current correction presents an opportunity for those who can withstand short-term volatility.
The U.S. listing of SK Hynix on Friday could provide a near-term boost for memory stocks, according to Bulk. Constructive management commentary on the durability of the memory cycle through the second half of 2026 could help lift both chipmakers and the broader Kospi. However, the timing of any sustained recovery remains uncertain and will depend on broader global market conditions.
In conclusion, the South Korean stock market's dramatic shift into bear territory serves as a cautionary tale about the risks of extreme market concentration and investor skepticism. While the Kospi may persist in the near term, the medium-term outlook remains constructive. Once global risk sentiment stabilizes, foreign investors are likely to revisit Korea, recognizing its central role in the global AI supply chain.
