#KoreaActivatesSidecarAsKOSPI200FuturesFall5% South Korea's bursa authority (Korea Exchange or KRX) officially activates the "sell-side sidecar" mechanism after the KOSPI 200 Futures index drops by 5% or more and remains that way for at least one minute. This mechanism is an automatic emergency measure to curb extreme volatility in the capital market caused by sudden mass selling.