Analysts warn that South Korean authorities' measures to control leveraged ETFs may fail to curb stock market volatility, after the South Korean stock market tumbled around 40% in just one month, wiping out over 2 trillion US dollars in market value. Regulators plan to cap retail investors' exposure to single-stock leveraged ETFs and raise trading costs, but analysts say these steps will struggle to reduce the funds' influence as long as investors still seek quick riches and the government does not directly limit leverage ratios as Hong Kong has done. A more effective approach would be liquidity injections, such as setting up a stock stabilization fund. Meanwhile, foreign investors sold a net 18.5 trillion won, or about 13 billion US dollars, of South Korean stocks in July.