Korea Exchange starts 4 p.m.-8 p.m. after-market trading session
Published · Updated
What happened
The Korea Exchange confirmed on September 13 that a new after-market trading session will begin on September 14, extending trading by two hours and broadening the range of stocks available for trading beyond the prior after-hours format.
Why it matters
An exchange operating-hours change can alter where liquidity forms, how retail orders are distributed across the day, and when price discovery occurs. It also creates an immediate test for market surveillance, broker systems, and volatility controls during the first trading sessions under the new structure.
The Korea Exchange said it will replace the existing 4 p.m.-6 p.m. after-hours single-price session with a new after-market session running from 4 p.m. to 8 p.m., effective September 14. The change also expands access to trading in smaller-cap stocks, making this an immediate market-structure shift rather than a forward plan. For Korean market-regulation leadership, the first days of operation matter because order flow, retail behavior, surveillance load, and volatility patterns can change quickly after launch.
Watch for
Korea Exchange trading volume report for after-market session on September 20 Korean Financial Services Commission statement on market surveillance effectiveness by September 21 Confirmation of new retail order distribution patterns from major brokerage firms by September 22 No significant volatility spikes reported during after-market trading on September 20
Sources
- Korea Exchange · krx.co.kr
Researched and written by AI from the sources listed, under published rules. How V³ Aware is made