The Regulatory Paradox: How ETF Restrictions in South Korea Triggered a 30% Rally in Small-Cap Stocks
The South Korean financial authorities' attempt to cool down the overheated leveraged ETF market has backfired spectacularly. Instead of reducing volatility, we are witnessing an explosive surge in the KOSDAQ index, which has jumped 30% from its July 30 lows. This is a vivid example of how regulatory measures that fail to account for retail investor behavior can create new, even more dangerous imbalances.
The restrictions imposed on leveraged ETFs tied to stocks of giants like Samsung Electronics and SK Hynix were meant to ease speculative pressure. Regulators raised cash collateral requirements for retail traders, but they miscalculated the key factor—they didn't anticipate where this capital would flow. Instead of leaving the market, it poured en masse into small-cap stocks within the KOSDAQ index.
On Monday, the KOSDAQ index soared 6.8%, triggering the third automatic trading halt on the Korea Exchange this month. This is no longer just a correction but a full-blown panic rally that has caught even seasoned market participants off guard. Park Wel, a global ETF analyst at Shinhan Securities, notes that retail investors who favor high volatility are now returning to KOSDAQ, abandoning the leveraged products market.
Irony of Fate: KOSDAQ vs. KOSPI
Notably, last week KOSDAQ rose steadily while the main KOSPI index lost ground. The divergence in performance between small caps and "blue chips" has now reached its widest level since the dot-com era. Meanwhile, KOSPI itself had previously plunged roughly 40% from its June peak to its July trough. The sell-off was triggered by AI-related instruments, leading to forced liquidations and the unwinding of margin positions worth billions of dollars. The leveraged ETF on SK Hynix fell 45% during that period.
Regulators have acknowledged that such products only amplified market swings, but their belated actions merely redirected the speculative flow into a new channel. Retail investors in Korea have historically gravitated toward high-risk instruments, and this same audience previously fueled the boom in ETFs tied to semiconductor makers. Now they've found a new "toy" in small-cap stocks, and regulators are once again forced to play catch-up with the market.
My take on the situation: The sustainability of the KOSDAQ rally hinges directly on whether the sell-off in the AI sector has run its course. If this is just another turn of the speculative cycle, exchange circuit breakers will keep triggering again and again. Regulators should learn a lesson: fighting volatility through restrictions on one asset class inevitably leads to a surge in another, less protected segment of the market.