South Korean regulators raise alarm over leveraged ETFs that surged to $9.1 billion in assets, with retail investors holding 92% as margin debt hits record

South Korea's KRX postpones weekly single-stock options launch after KOSPI drops 10%, leveraged ETFs hit $9.1B, and regulators express regret over rapid

South Korea's FSS warned against leveraged Samsung and Hynix ETFs, sending Micron down 13%. Here's what the memory chip cycle risk means for investors.