According to the Korea Exchange, program sell orders on the main bourse were suspended for five minutes at 9:47:58 a.m. due to moves in the Kospi 200 futures index.
At the time of the trigger, the Kospi 200 futures index stood at 955.02, down 51.20 points, or 5.08%, from the previous session's close.
A sell-side sidecar on the main bourse is triggered when the Kospi 200 futures index falls 5% or more and holds for one minute.
It marked the first sell-side sidecar in the Kospi market since Aug. 19, indicating the index is undergoing sharp swings again after about two months.
As of 9:49 a.m., the Kospi was at 6,125.17, down 259.07 points, or 4.06%, from the previous day.
At the same time, the Kosdaq was at 828.26, down 20.93 points, or 2.46%.