South Korea’s top financial watchdog just handed retail investors a lesson in why leverage and cyclical industries make uncomfortable bedfellows.
The Financial Supervisory Service, South Korea’s equivalent of the SEC, issued a pointed warning about the dangers of leveraged single-stock ETFs tracking Samsung Electronics and SK Hynix. The regulator’s message landed hard: FSS Governor Lee Chan-jin publicly expressed regret for not blocking the launch of 16 such products before they ever reached the market.
The ripple effect crossed the Pacific almost immediately. Micron Technology shares fell more than 13% on June 23, 2026, the stock’s largest single-day decline in over a year, as the warning rattled sentiment across the entire memory chip sector.
How $9 billion appeared in a few weeks
The 16 leveraged ETFs in question are 2x products, meaning every 1% move in the underlying stock becomes a 2% move in the fund.
