True
South Korea's benchmark KOSPI index triggered a buy-side sidecar, a market-wide trading halt mechanism on the buy side, amid strong upward momentum in share prices, according to material published by the Korea Exchange (KRX).
A sidecar is an automated measure that halts program trading for a set period when the KOSPI moves sharply within a short window. A buy-side sidecar is triggered when rapid gains push the index past the threshold, temporarily suspending buy-side program orders to curb excessive volatility.
The Korea Exchange posts sidecar activations through its official disclosure channels, and images associated with the activation were published on KRX's disclosure page.
Sidecar activations on the KOSPI are part of the exchange's circuit-breaker framework designed to manage sudden swings in program trading activity. When triggered, the mechanism gives the market a cooling-off period before normal program order flow resumes.
The claim that the KOSPI activated a buy-side sidecar is True.