The Bank of Korea said that leveraged exchange-traded funds (ETFs) focusing on Samsung Electronics and SK Hynix could increase financial risks for individual investors [1].
This warning highlights a growing concern over market instability as South Korea's retail investors increasingly bet on the semiconductor sector. Because a few massive companies dominate the national index, extreme volatility in these specific stocks can trigger wider economic shocks.
In a written response to Rep. Park Seong-hoon (PPP) delivered on May 5, 2026, the central bank said it was concerned over the concentration of investment in single-stock leverage products [1]. The bank said that the market share of semiconductor giants has expanded significantly due to strong performance in the industry [2].
According to the Bank of Korea, Samsung Electronics and SK Hynix account for 36.1% [1] of the total market capitalization on the KOSPI market. The bank said that the combined market capitalization and trading volume of these two companies already exceed half of the overall stock market [2].
"Samsung Electronics, SK Hynix's market capitalization and trading volume share have expanded to the point where they account for more than half of the stock market, and the expansion of investment in single-stock leverage ETFs may deepen this concentration phenomenon," the Bank of Korea said [2].
Leveraged ETFs are designed to multiply the daily returns of an underlying asset. While they offer higher potential gains, they also amplify losses during downturns. The Bank of Korea said that the high concentration in these specific semiconductor stocks, combined with the nature of leverage, increases the likelihood of severe financial losses for retail investors if the sector experiences a correction [2].
The central bank said that the recent strong performance of the semiconductor sector has already led to a situation where concentration in certain companies has expanded significantly within the domestic stock market [2].
“The Bank of Korea warned that leveraged exchange-traded funds focusing on Samsung Electronics and SK Hynix could increase financial risks.”
The Bank of Korea's intervention signals a shift toward monitoring 'micro-systemic' risks where the popularity of specific financial products creates a feedback loop of volatility. By highlighting the 36.1% market cap concentration, the bank is alerting the public that the South Korean equity market is increasingly a bet on the global semiconductor cycle rather than a diversified economy, making retail portfolios highly vulnerable to industry-specific shocks.
