Circuit breaker triggered after Kospi crash

Seoul stocks tumbled Friday, prompting a sell-side sidecar and then a 20-minute circuit breaker as the Kospi fell more than 8 percent intraday.

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A currency trader passes by a screen showing the Kospi index and the foreign exchange rate between U.S. dollar and Korean won at the foreign exchange dealing room of the Hana Bank headquarters in Jung District, central Seoul, on June 26.

Stocks plunged Friday morning, triggering an automatic circuit breaker that temporarily halted program sell orders on Korea's main bourse.

The 20-minute circuit breaker, a halt in all trading, was activated around noon after the Kospi plunged over 8 percent during intraday trading.

Earlier in the day, a sell-side sidecar was activated on the Kospi and suspended trading for five minutes around 11:12 a.m., after the Kospi 200 futures index dropped 5 percent or more and held that level for one minute.

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At the moment of activation, the futures index stood at 1,382.00, down 72.88 points, or 5 percent, from the previous session's close.

It was the 14th sell-side sidecar that was activated on the Kospi since the beginning of 2026. 

As of 11:19 a.m., the Kospi was down 488.65 points, or 5.47 percent, at 8,441.65. The secondary Kosdaq index was down 22.21 points, or 2.50 percent, at 865.60.


Update, June 26: Added information about circuit breaker.


BY SHIN HYE-YEON [[email protected]]

This article was originally written in Korean and translated by a bilingual reporter with the help of generative AI tools. It was then edited by a native English-speaking editor. All AI-assisted translations are reviewed and refined by our newsroom.

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