South Korea's Kospi Index Declines 10%, Triggers Trading Halt Amid AI Rally Concerns
On Tuesday, the South Korean stock market experienced a significant decline, with the Kospi index falling 10% and triggering a circuit breaker that temporarily halted trading. The drop came amid growing concerns that the recent rally in artificial intelligence (AI) stocks may have been overextended relative to underlying fundamentals.
The Kospi index had more than doubled since the start of 2026, driven largely by AI-related stocks. Shares of SK Hynix and Samsung Electronics, which together account for nearly 55% of the benchmark index, had tripled and quadrupled respectively this year before declining over 12% on Tuesday. The sell-off was not isolated to South Korea; other Asian markets, including India, also saw declines.
The AI rally had propelled the Kospi to multiple record highs in 2026, with the most recent peak occurring on Monday. However, some analysts have cautioned that the rapid gains may not be supported by underlying earnings or economic indicators. Tuesday's decline could be an early sign of a potential correction, though it is too early to determine if a broader bubble is bursting.
The circuit breaker mechanism was activated automatically when the index fell by 10%, halting trading for 20 minutes. This is a standard procedure designed to prevent panic selling and allow investors to reassess market conditions.
Market participants will be watching for further developments, including any statements from South Korean regulators or company earnings reports, to gauge the sustainability of the AI-driven rally.
