South Korean investors face potential forced liquidations after the KOSPI index fell approximately 10% [2] following a brief peak at 8,000 points [2].

The situation creates a systemic risk for the Seoul market. When investors borrow heavily to buy stocks—a practice known as margin trading—a sharp price drop can trigger automatic sell-offs by securities firms to recover loans, potentially fueling a further downward spiral.

Data from the Financial Investment Association shows that credit loan balances reached a record high of 36.6675 trillion KRW [2] on May 15, 2024. By May 19, 2024, that balance had decreased by about two% [2] to 35.856 trillion KRW [2].

Despite the market's volatility, the total amount of debt used for investing remains near its historic peak. The KOSPI touched the 8,000-point level on May 15, 2024 [2], but the subsequent decline by May 20, 2024, has left many margin traders vulnerable.

Securities firms typically issue margin calls when the value of the collateral falls below a certain threshold. If the investor cannot provide more cash or securities, the firm executes a forced liquidation, selling the assets regardless of the current market price.

Market analysts said that because the debt levels have not significantly decreased alongside the index, the risk of a cascading liquidation event remains high. This pressure could act as a trigger for additional price drops if a large volume of forced sales hits the market simultaneously.

Margin loan balances remain near a historic 36 trillion-won peak.

The disconnect between the falling KOSPI index and the stagnant level of margin debt indicates that many retail investors are holding onto losing positions rather than deleveraging. If the market continues to slide, the resulting forced liquidations could create a 'feedback loop' where automatic selling drives prices lower, triggering more margin calls and further selling.