KOSPI Plummets 8.9% on Black Tuesday: Causes of Circuit Breaker and Future Outlook
The KOSPI index plummeted 8.9% on the 13th, triggering an intraday circuit breaker. We analyze the three key causes of this Black Tuesday, including Middle East conflict fears and the plunge of semiconductor leaders.

KOSPI Circuit Breaker Triggered, Black Tuesday Becomes Reality
On the 13th, the KOSPI index plummeted by 8.9% to close at 6806, plunging the market into the fear of a 'Black Tuesday'. Notably, a circuit breaker was activated during intraday trading, temporarily halting transactions as selling pressure cascaded uncontrollably. This serves as a strong signal of extremely contracted investor sentiment, with market participants' anxiety reaching a peak.
3 Key Factors Driving the Stock Market Crash
1. Escalation of Middle East Conflicts and Shrunken Global Investment Sentiment
The biggest blow originated from concerns over the escalating armed conflict between the US and Iran. As Middle East geopolitical risks exploded, international oil prices surged over 4% in the short term, and concerns over global supply chain disruptions strongly fueled a preference for safe assets. Consequently, massive capital outflow occurred across Asia, including the domestic stock market.
2. Simultaneous Weakness of Semiconductor Leading Stocks
The sluggishness of the top two semiconductor companies, which drive the domestic stock market, also exacerbated the index decline. Despite the strong positive news of a successful US ADR listing, SK Hynix staged a 15% plunge amid a 'bomb of sell-offs' by foreign investors. Samsung Electronics also failed to avoid the simultaneous decline amid individual issues such as the partial acceptance of an injunction prohibiting the transfer of key personnel.
3. Massive Panic Selling by Foreign and Institutional Investors
Amid the Black Tuesday fears, retail investors' buying power was insufficient to defend the market. A massive simultaneous sell-off by foreign and institutional investors led to a collapse in supply and demand, which in turn triggered a chain liquidation in the derivatives market, maximizing short-term volatility.
Key FAQ Related to KOSPI Crash
- Q. What is a circuit breaker?
A. It is a system that temporarily suspends stock trading to mitigate market shocks when stock prices fluctuate sharply. It is a safety mechanism designed to provide investors with time to calmly assess the situation. - Q. Is there a possibility of a short-term market rebound?
A. Currently, the uncertainty of the Middle East situation is high, and a strong wait-and-see attitude prevails ahead of the major US Consumer Price Index (CPI) announcement scheduled for this week. While a short-term technical rebound is possible, high volatility is expected to remain until fundamental improvements are confirmed.