Seoul, 8 June 2026 – South Korea’s powerful retail-investor base is facing a major test after a sharp selloff in semiconductor shares exposed the risks of leveraged bets, soaring margin debt and heavy concentration in the country’s artificial-intelligence-driven stock rally.

Retail investors in South Korea, often known locally as “ants”, have played a major role in the country’s market surge over the past year. Many piled into semiconductor and AI-linked shares, encouraged by the global boom in chip demand, strong gains in Samsung Electronics and SK Hynix, and the belief that South Korea sits at the centre of the next phase of AI infrastructure growth.

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Author

Kenji Yamamoto

Kenji Yamamoto is a Senior Fellow at The Ledger Asia, where he explores the critical nexus of Asian international relations, economic development, and environmental sustainability. With extensive experience in cross-border policy analysis, Kenji provides a unique perspective on how diplomatic alliances and green energy transitions drive long-term growth across the Asia-Pacific.

Previously an advisor for regional development banks, he specializes in sustainable infrastructure and the circular economy’s role in modernizing emerging markets. At The Ledger Asia, Kenji’s deep-dive reports help readers navigate the complex balance between rapid industrialization and the global imperative for climate resilience and corporate responsibility.