Korea Exchange Establishes Guidelines for Aftermarket Trading Suspension

by SONG YOONSEO Posted : September 4, 2026, 16:08Updated : September 4, 2026, 16:08

The Korea Exchange is enhancing investor protection measures to minimize disclosure gaps ahead of the opening of its aftermarket on the 14th.


According to the Korea Exchange's legal portal on the 4th, the exchange announced a revision to the implementation rules for disclosure regulations in the securities and KOSDAQ markets the previous day. This is to address trading suspension matters after the disclosure operating hours (7:30 AM to 6:00 PM) in preparation for the aftermarket.


The revision allows for the suspension of trading in stocks if significant information related to those stocks becomes known through media reports after the disclosure operating hours.


Specifically, the reasons for suspension include: ▲ occurrence of bankruptcy ▲ failure to meet audit opinions ▲ embezzlement or breach of trust by executives ▲ referral or indictment by investigative agencies for violations of accounting standards ▲ dismissal of applications for rehabilitation procedures. If such facts are confirmed through rumors or reports, market actions can be taken.


Currently, in regular trading hours, if a reason for trading suspension is disclosed, the exchange immediately halts trading. This revision extends such investor protection measures to the aftermarket. The revised rules will take effect from the opening of the aftermarket.


This measure is expected to apply similarly to the alternative trading system (ATS) NextTrade's aftermarket starting on the 14th.





* This article has been translated by AI.