KOSPI Drops Over 8% Amid Circuit Breaker Activation

By Kwon,sung jin Posted : October 15, 2026, 14:00 Updated : October 15, 2026, 14:00
The South Korean stock market experienced a sharp decline on October 15, with both the KOSPI and KOSDAQ indices falling by more than 8%, leading to consecutive circuit breaker activations. This marked the first activation of the first-level circuit breaker for both indices since late July.

According to the Korea Exchange, as of 1:40 PM, the KOSPI was down 436.42 points (7.23%) at 5,574.39 compared to the previous trading day.

Earlier in the day, the KOSPI triggered a first-level circuit breaker at 12:38 PM after dropping over 8%. The KOSDAQ market also activated its circuit breaker at 12:23 PM, halting trading for 20 minutes.

The Korea Exchange activates a first-level circuit breaker when either the KOSPI or KOSDAQ falls by more than 8% for one minute. When triggered, trading is suspended for 20 minutes, and order acceptance, excluding canceled orders, is paused. After trading resumes, a single-price trading session occurs for 10 minutes.

In the securities market, foreign investors continued to sell off shares. While individual and institutional investors bought a net 1.9029 trillion won and 1.8665 trillion won, respectively, foreign investors sold a net 4.2838 trillion won. This marks six consecutive trading days of net selling by foreign investors.

Most large-cap stocks also saw declines. Samsung Electronics fell by 8.94%, SK Hynix by 10.36%, SK Square by 8.45%, and Samsung Electro-Mechanics by 15.36%.

At the same time, the KOSDAQ index recorded a drop of 60.80 points (7.36%) to 763.38. In the KOSDAQ market, foreign investors were net buyers of 910 billion won, while individuals and institutions sold a net 597 billion won and 354 billion won, respectively.

Major stocks in the KOSDAQ also faced declines, including EcoPro (-8.18%), Alteogen (-4.68%), JUSUNG Engineering (-12.89%), Wonik IPS (-14.24%), and IOTech (-9.5%).

Han Ji-young, a researcher at Kiwoom Securities, noted, "There may be a sense of uncertainty about where the bottom lies. In the upcoming third-quarter earnings season, we will need to address AI concerns as we did in the second quarter, which may lead to increased volatility during that process."




* This article has been translated by AI.

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