Market NewsKorea Exchange Triggers Sell-Side Circuit Breaker as KOSPI Falls Below 4,000

The Korea Exchange (KRX) on November 5 activated a sell-side sidecar — a temporary halt on program selling — after the KOSPI 200 futures plunged sharply. It marked the second such intervention this year, following a similar action on April 7.

A sidecar is a market stabilization mechanism designed to prevent excessive volatility in the cash market caused by sharp swings in the futures market. It is triggered when the KOSPI 200 futures fall 5% or more from the previous closing price and remain at that level for one minute.