U.S. trading saw South Korean stocks fluctuate following the announcement of martial law.

On Tuesday, South Korean stocks fell in the U.S. due to President Yoon Suk Yeol's declaration of martial law and use of emergency powers, which increased global concerns about instability in the world's 13th largest economy.

The stock market in South Korea, which monitors over 90 large and mid-sized corporations, dropped 6% to reach a new 52-week low.

The shares of several major South Korean companies, including Korea Electric Power, Coupang, KT Corporation, and Posco, experienced significant declines in their American Depositary Receipts (ADRs) and stock prices.

The president accused opposition parties of supporting North Korea and controlling parliament. Yoon did not specify how martial law would affect governance and democracy in the country.

Since 1980, it is the first time a South Korean leader has issued a martial law declaration, prohibiting all political activities and acts that "incite social disorder."

According to local media reports, the Korea Exchange will hold an emergency meeting to prepare response measures before deciding whether to open the market on Wednesday.

The U.S. dollar jumped 1.9% against the South Korean won Tuesday.