South Korea's ousted president Yoon plotted martial law to eliminate rivals, probe finds

Independent counsel Cho Eun-suk concluded that ousted South Korean president Yoon Suk Yeol schemed for more than a year to impose martial law to crush political rivals and consolidate power, including a brief Dec. 3, 2024 decree that triggered mass protests, rapid impeachment and his eventual removal; investigators say Yoon and military allies also orchestrated operations against North Korea to manufacture a pretext for martial law. Yoon is jailed and has been indicted alongside 23 officials and several generals, while parallel probes and raids on Unification Church facilities have led to the arrest and indictment of his wife and widened bribery investigations involving politicians across parties. The findings heighten political and governance risk in Korea, with potential implications for defense leadership, policy continuity under President Lee Jae Myung and investor sensitivity to corruption and institutional stability.

Analysis

Independent counsel Cho Eun-suk concluded after a six-month probe that ousted President Yoon Suk Yeol schemed for more than a year to impose martial law to eliminate political rivals, with a December 3, 2024 decree that lasted only hours and precipitated mass protests, a legislature vote against the order, immediate impeachment proceedings in December and formal removal by the Constitutional Court in April; Yoon is jailed and has been indicted along with 23 senior officials and several generals, including then-Defense Minister Kim Yong Hyun, Prime Minister Han Duck-soo and Deputy Prime Minister Choi Sang-mok.

Investigators say Yoon and military associates orchestrated operations against North Korea from October 2024 — including alleged drone flights — and reshuffled military leadership to secure allies, claims that the probe links directly to an attempted manufactured pretext for martial law; North Korea’s lack of retaliation left legal grounds weak and highlights erosion of civil-military norms and elevated geopolitical risk in the peninsula.

Police raids on Unification Church facilities in Seoul and Gapyeong, and the arrest and indictment of Yoon’s wife Kim Keon Hee over alleged bribery, show the scandal has broadened into cross-party corruption probes and strengthens the likelihood of prolonged legal and political uncertainty under President Lee Jae Myung; sentiment indicators are strongly negative (score -0.75) with a material market-impact score (0.6), implying short-term risk-off flows and volatility for Korea-sensitive assets.

Key Decisions for Investors

• Reduce near-term exposure to South Korea equities and assets with high government or military linkage given elevated political and governance risk
• Hedge Korean equity and KRW currency exposure until key legal milestones (major indictments, trials, cabinet/military leadership appointments) provide clarity
• Avoid initiating new positions in companies dependent on defense procurement or state contracts until procurement policy and military leadership stabilize
• Monitor prosecution timelines, Unification Church probe developments and official statements from President Lee as triggers to reassess risk and selectively re-enter on demonstrable political and institutional normalization