The Korea Exchange announced that it activated a 'Sidecar' at 1:58:59 p.m. on the 11th, suspending the validity of program buy orders in the KOSDAQ market for five minutes. This Sidecar activation is a measure taken in response to the sharp increase in the KOSDAQ 150 futures price and the spot index. According to the disclosure, the KOSDAQ 150 futures price rose by 101.90 points (6.15%) to 1,757.60 points compared to the previous day's closing price of 1,655.70 points. At the same time, the KOSDAQ 150 spot index also climbed by 82.68 points (4.94%) to 1,753.70 points from the previous day's close of 1,671.02 points. Regarding this, the Korea Exchange stated, "Due to the fluctuations in the KOSDAQ 150 futures price and spot index (KOSDAQ 150), the validity of program buy orders will be suspended for the next five minutes." A Sidecar is a market stabilization mechanism designed to mitigate the impact of sharp price movements in the futures market on the spot market. When certain conditions are met, it suspends the validity of program trading orders for five minutes to curb excessive volatility. This measure was implemented based on Article 13 of the KOSDAQ Market Business Regulations and Article 14 of the Enforcement Detailed Rules of the same regulation.