South Korea's KOSPI stock market has entered a bear market after falling approximately 27% [1] from its peak in June 2026.
This downturn marks a sharp reversal for a market that served as the world's best-performing index for two consecutive years. The crash threatens the financial stability of millions of retail investors who used high leverage to ride the previous rally.
The decline was accelerated by a reversal of an AI-driven rally led by industry giants Samsung Electronics and SK Hynix [1], [2]. This shift coincided with significant foreign outflows and rising tensions in the Middle East, which triggered spikes in oil prices [1], [2].
The volatility reached a critical point on a Monday in late July 2026, when the index fell seven percent [2]. While some reports indicated a plunge as high as nine percent [2], the seven percent figure remains the primary reported decline for that specific session.
The impact on individual traders has been severe. More than 1.2 million retail accounts have been hit with margin calls [1]. These calls occur when brokers demand additional funds to cover losses on borrowed money used for investments.
Financial data suggests the scale of the wipeout is extensive. Hundreds of thousands of Korean investors have been wiped out entirely [1]. The combination of heavy retail leverage and sudden price drops created a cascading effect across the Seoul-based exchange.
Market participants are now grappling with the end of the "dream rally" that had defined the region's financial landscape for two years [2]. The rapid transition from record gains to a bear market has left many retail participants without the capital necessary to maintain their positions.
“The KOSPI stock market has entered a bear market after falling approximately 27% from its peak.”
The KOSPI's collapse illustrates the systemic risk associated with retail leverage during speculative bubbles. By anchoring the market's growth to a narrow set of AI-focused semiconductor stocks, South Korean investors became vulnerable to both sector-specific corrections and macroeconomic shocks, such as geopolitical instability and oil price volatility. This event underscores how quickly a 'best-performing' market can destabilize when high-leverage retail trading meets a reversal in global sentiment.
