The suspension, which comes to reduce risks for investors, will be effective from 6 p.m. on Sept. 23 to 6 a.m. the following day.
Overnight transactions are normally settled together with the ones from the following day's regular session. However, because the market will be closed for one of the country's biggest holidays, trades made on the night of Sept. 23 will not be settled until regular trading resumes on Sept. 28.
KRX said the long holiday closure could leave investors exposed to sharp price swings, increasing the risk of margin calls, forced position closures and liquidity shortages. It could also make it harder for investors and brokerages to manage any risks until trading resumes.
The suspension will cover all products available for overnight trading on the KRX including KOSPI 200 and Mini KOSPI 200 futures and options tied to the country's benchmark large-cap index, as well as KOSDAQ 150 futures and options linked to major growth stocks.
They also includes weekly options on the KOSPI 200 and KOSDAQ 150, U.S. dollar futures and three-year and 10-year government bond futures.
KRX said the measure is in line with practices at other major Asian exchanges including those in Hong Kong and Taiwan, which also suspend such trading ahead of extended holidays.
AJP Takeaways
- The Korea Exchange will suspend all overnight derivatives trading from 6 p.m. on Sept. 23, 2026, to 6 a.m. on Sept. 24, 2026, ahead of South Korea's Chuseok holiday.
- Trades that would normally be settled with the following regular session will not be processed until Sept. 28, 2026, when daytime trading resumes after the holiday break.
- The Korea Exchange said the suspension is intended to reduce exposure to sharp price swings, margin calls, forced position closures and liquidity shortages during the extended market closure.
Copyright ⓒ Aju Press All rights reserved.
