Bullstory
Jul 10, 2026

2024year 8month 5day KOSPI circuit breaker triggered, here's why: Nikkei plunges

2024year 8month 5A circuit breaker was triggered on the KOSPI. The KOSPI closed down 8.8%, while the KOSDAQ fell more than 11%.


2024year 8month 5day KOSPI circuit breaker triggered, here's why: Nikkei plunges

2024year 8month 5A circuit breaker was triggered on the KOSPI. The incident temporarily halted trading that day, directly affecting investors' responses.

A circuit breaker is triggered when an index has fallen at least 8% and the decline persists for 1minutes. Under the rules, the mechanism is designed to determine whether a sharp fall of a certain level has stopped.

The KOSPI closed down 8.8%, recording the largest one-day decline ever at the time. The KOSDAQ plunged more than 11% on the same day.

At the time, this shock 4attracted attention because it marked the first circuit breaker to be triggered in years. The scale of the temporary shock and the fact that it was a rare activation were recorded together.

The sharp drop in Japan’s Nikkei index was cited as the apparent cause of the decline. The Nikkei’s plunge spread across Asian markets during the morning session and was understood to have affected domestic indices as well.

The title of the column covering the incident was “Conditions for the Unwinding of the Yen Carry Trade.” The column took the form of a retrospective on the circuit-breaker experience at the time and related circumstances.

Sources: 연합인포맥스

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