KOSDAQ Plunges 8%, Circuit Breaker Halts Trading for 20 Minutes (Updated)

Circuit breaker triggered for the first time in two and a half months, since late July.

With the KOSPI's 5,500 level also under threat intraday, a display board in the dealing room at Hana Bank's headquarters in Jung-gu, Seoul, shows the KOSPI, KOSDAQ and won-dollar exchange rate on Oct. 15. The KOSPI opened at 5,673.01, down 335.8 points (5.59%) from the previous day's close of 6,008.81, and has continued to widen its losses. (Oct. 15, 2026) Photo by Cho Yongjun

A circuit breaker was triggered after the KOSDAQ market plunged more than 8%.

According to the Korea Exchange, a circuit breaker was triggered in the KOSDAQ market at around 12:23:13 p.m. on Oct. 15, halting trading for 20 minutes.

At the time, the KOSDAQ index stood at 757.88, down 66 points (8.01%) from the previous trading day.

When a circuit breaker is triggered, trading is halted for 20 minutes, and the acceptance of orders is also suspended, except for cancellation orders. After trading resumes, single-price auction trading takes place for 10 minutes.

This was the first Level 1 circuit breaker in the KOSDAQ market in about two and a half months, since July 29.

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