On the 27th, both the Korean and U.S. stock markets will suspend regular trading. However, the circumstances of the two markets differ. For the United States, it is an ordinary Sunday, while for the domestic market, the four-day trading gap that began with the Chuseok holiday comes to an end on this day.

Domestic Market Closed for Four Days Over Chuseok Holiday and Weekend

The last trading day for the domestic market was Wednesday, the 23rd. The KOSPI and KOSDAQ were closed on Thursday the 24th and Friday the 25th, the weekdays of the Chuseok holiday, followed by the weekend of Saturday the 26th and Sunday the 27th.

The final day of this year's Chuseok public holiday, the 26th, overlapped with a Saturday. However, under regulations on public holidays for government offices, substitute holidays for the Lunar New Year and Chuseok breaks are only designated when they overlap with a Sunday or another public holiday. The agenda items disclosed at the Cabinet meeting held on the 22nd also included no plan to designate the 28th as a temporary public holiday. Accordingly, Monday the 28th remains a weekday, and the Korea Exchange's regular session opens at 9 a.m.

New York Stock Market Opened Three Times While Korea Was Closed

While the domestic market was closed, the New York stock market did not stop. A comparison of the two countries' trading hours by the reporter shows that after the domestic market closed at 3:30 p.m. on the 23rd until before the opening on the 28th, the U.S. regular session opened three times: on the 23rd, 24th, and 25th local time. In Korean time, this spans from 10:30 p.m. on the 23rd to 5 a.m. on the 26th.

According to the 2026 holiday schedule released by the New York Stock Exchange, the only regular market holiday in September is Labor Day on the 7th, so the U.S. market operated normally during the Chuseok holiday period.

In contrast, the new gap the U.S. market must absorb on the 28th is only the two-day weekend of the 26th and 27th. Although both markets were closed on the same day, the domestic market must reflect at once the price changes of three overseas trading days as well as movements in exchange rates, oil prices, and interest rates during the holiday period. The U.S. market only needs to digest developments that emerged over the weekend.

Timeline of Market Schedule for the 28th

The day's schedule on the 28th proceeds in chronological order:

• 9 a.m.: Domestic market opens
• 3:30 p.m.: Domestic market closes
• 5 p.m.: Nasdaq premarket begins (Korean time)
• 10:30 p.m.: U.S. regular session opens (the 28th)
• 5 a.m.: U.S. regular session closes (the 29th)

As daylight saving time is currently in effect, Korea is 13 hours ahead of the U.S. East Coast. With the domestic session opening first and the U.S. session following, the domestic market on the 28th will proceed without being able to observe the U.S. Monday session.

[This article is an informational piece written for the purpose of providing information, based on public materials such as market opening schedules and regulations on public holidays for government offices, and AI was used in part of its production. It does not recommend the purchase or sale of any specific stocks or financial products. Market schedules are subject to change depending on circumstances at the exchanges, and responsibility for losses arising from investment lies with the investor.]