'Black Tuesday' for Japanese and Korean Stock Markets: Korean Market Triggers Circuit Breaker, Nikkei Plunges, AI Frenzy Undergoes a Phased Adjustment
"Black Tuesday" for Japanese and South Korean Stock Markets: KOSPI Triggers Circuit Breaker, Nikkei Plunges as AI Rally Undergoes Correction
Asian stock markets experienced severe volatility. South Korea's KOSPI index plunged over 8% intraday, triggering a 20-minute market-wide trading halt, and closed nearly 10% lower, marking its third-largest single-day drop this year. Japan's Nikkei 225 fell approximately 3.5%, ending an eight-session winning streak. The tech and semiconductor sectors led the decline, with heavyweights like Samsung Electronics and SK Hynix suffering double-digit losses, fueled by foreign investor selling and panic.
The sell-off stemmed from multiple factors. A weak prior session for U.S. tech stocks, especially the "Magnificent Seven," raised concerns about AI's profitability timeline. Intense profit-taking followed massive year-to-date gains (KOSPI up over 80%, Nikkei hitting record highs). Hawkish signals from the Fed, suggesting potential rate hikes due to strong U.S. data, pressured rate-sensitive growth stocks. Structural vulnerabilities, like the high concentration of semiconductor giants in the KOSPI, amplified the drop, with foreign capital outflows exacerbating the move.
Short-term volatility is expected to persist, contingent on U.S. market stability and Fed policy. However, the long-term AI narrative remains robust. Forecasts predict trillions in global AI capital expenditure through 2031. South Korea's leading position in critical areas like HBM memory, with major players' order books filled into 2027, provides fundamental support. This correction may represent a shift from speculative frenzy to a focus on tangible AI infrastructure, offering a potential entry point for long-term investors.
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