Korea's stock market capitalization has surpassed 6,000 trillion won ($4.4 trillion) for the first time. On Wednesday, the KOSPI and KOSDAQ indices broke through the 6,600 and 1,220 levels, respectively, setting new all-time highs. The combined market capitalization of KOSPI, KOSDAQ and KONEX reached approximately 6,105 trillion won. This can be attributed to the government's active efforts to advance the capital market, foreign and domestic investors' reassessment of Korean equities, and a semiconductor boom. Expectations are also high that an accelerating "money move" from real estate to stocks will bring a virtuous cycle to the broader economy, including rising investment and consumption. The government explains that the Korean economy's surprise 1.7% growth rate in the first quarter was partly supported by stable consumer sentiment driven by rising stock prices.
However, a closer look reveals that there is little room for unbridled celebration. Samsung Electronics (005930.KS) and SK hynix (000660.KS) together account for more than 40% of the total KOSPI market capitalization. While the automotive and shipbuilding sectors are holding up, the market is essentially flying on a single "semiconductor wing." If the semiconductor super-cycle nears its end, a flood of profit-taking could boomerang on the market. In particular, margin trading — or "debt-fueled investing" — which is running at record highs, is a cause for concern. Margin loan balances recently stood at around 35 trillion won, nearly doubling in the past year. If stock prices plunge, retail investors could suffer major losses, potentially turning into a social problem. The Korean market is already showing "roller-coaster" volatility, with the index swinging sharply on even minor domestic and external variables in the aftermath of its short-term surge.
Financial authorities must minimize market risk through preemptive management of margin debt and accelerate the delisting of troubled companies. Improvements in corporate governance, the elimination of unfair trading practices, and greater disclosure transparency are also required. Above all, the fundamental solution lies in improving the overall quality of the economy and creating a business-friendly environment. As long as economic growth and corporate earnings are supported, stock prices will naturally follow. The surge in semiconductor stocks has been driven precisely by solid earnings. Artificial stock price support can lead to a bubble collapse. We must remember that only when the real economy and capital markets grow together can Korea move beyond resolving the "Korea discount" and usher in an era of a "Korea premium." Now is the time to guard against market overheating and focus on improving the market's fundamentals.
