South Korea’s Financial Supervisory Service (FSS) warned that heavy concentration of household financial assets in leveraged stock investments could seriously damage household financial health. FSS Governor Lee Chanjin urged financial institutions to strengthen risk management and take preemptive steps when needed. Industry data show that between May 27 and June 22, retail investors were net buyers of 8.9 trillion won ($5.8 billion) in leveraged ETFs tracking single heavyweight stocks. The warning comes as the KOSPI has risen this year on a global boom in spending on artificial intelligence data centers, even as volatility has increased.