South Korea’s Financial Services Commission (FSS) is taking action to dampen the surge in single-stock exchange-traded funds, a move aimed at curbing speculative excesses that have come to dominate local trading volumes.

The regulatory intervention follows growing concerns that the rapid growth of these concentrated funds is creating systemic risks and distorting price discovery in the underlying equities.

The decision marks a shift from previous warnings issued by FSS leadership, who recently cautioned that the boom in leveraged ETFs was allowing the "tail to wag the dog" in terms of market stability.

While the regulator had previously focused on the dangers of leverage, the new measures target the broader frenzy around single-stock ETFs, which have seen explosive inflows as investors seek high-beta exposure to individual companies.

This regulatory tightening comes as South Korea’s broader strategy to attract ETF capital back to domestic markets faces headwinds.

Reports indicate that initiatives designed to bolster local liquidity and retain investment funds are struggling to gain traction amid the speculative nature of current trading patterns.