The South Korean stock market, once the world's hottest equity market, has taken a sharp turn, falling into bear territory within weeks. This dramatic reversal highlights the market's heavy reliance on artificial intelligence (AI) and the potential risks associated with such concentration. The Kospi, South Korea's benchmark stock index, has seen a 20% decline from its June 19 record high, with a 5% drop on Wednesday alone. This downturn is primarily attributed to global investors' growing skepticism about AI, which has dominated the market's performance this year. The Kospi's performance is heavily influenced by the performance of chipmakers Samsung Electronics and SK Hynix, which accounted for over half of the index's weighting as of June. This extreme dependence on a few key players has both lifted and now threatens to sink the index. The correction in the Kospi is more about positioning than a fundamental change in the market's outlook. The market's rapid decline is a result of investors taking profits after a strong rally, with Korean equities becoming one of the most crowded AI trades globally. This heightened uncertainty and the potential moderation of earnings upgrades have made investors more cautious, leading to a healthy reset in the market. The gamification of finance, driven by news flows and fads, has contributed to the market's volatility. The Kospi's volatility index has surged over 200% since the start of the year, indicating the market's sensitivity to news and trends. Despite strong earnings from companies like Samsung, the market is questioning the pace of earnings growth rather than the sustainability of AI demand. This valuation adjustment is a key factor in the market's current state. However, the long-term fundamentals for memory makers remain intact, with a multi-year supply shortage and long-term contracts with hyperscale customers. The U.S. listing of SK Hynix and constructive management commentary on the memory cycle's durability could provide a near-term boost for the market. The medium-term outlook remains constructive, but the timing of any sustained recovery is uncertain and depends on broader global market conditions. The South Korean stock market's journey from the world's hottest to a bear market in a few weeks underscores the importance of diversifying investments and the risks associated with extreme market concentration.
