South Korea’s equity rout deepened into a full-scale leverage crisis between June 22 and July 16, as a sharp fall in share prices triggered margin calls, forced liquidations and automatic rebalancing across leveraged exchange-traded funds. The market lost 25.17% over the period, while total margin financing declined only 11%, from about 38.63 trillion won to 34.37 trillion won.
The gap between price losses and debt reduction showed that the selloff was not only a normal correction in share prices. Asset values were falling more than twice as fast as traders were cutting borrowed positions, creating a negative feedback loop across the market. Each decline raised margin pressure, which forced more selling, which then pushed prices lower again.
At the center of the downturn were newly launched 2x leveraged ETFs tied to Samsung Electronics and SK Hynix, South Korea’s two dominant semiconductor names. The products were introduced on May 27 and quickly drew large retail flows into concentrated long positions. By June 19, retail traders had accumulated about 8.2 trillion won in long ETF exposure, while short ETF positions stood at only 0.3 trillion won.
That imbalance left the market highly exposed to a one-way reversal. Samsung Electronics and SK Hynix eventually accounted for about 52% of KOSPI market capitalization, meaning weakness in the two stocks could move the entire benchmark. When selling pressure began, the same leveraged structure that had amplified gains also intensified losses.
Foreign funds had already been reducing exposure. By the end of June, overseas accounts had sold a net $12.63 billion in Korean equities. Domestic buyers, including retail traders, absorbed much of that supply, purchasing roughly 42.4 trillion won in shares. The shift effectively transferred a large amount of market risk from global institutions to Korean households.
The collapse became more severe after public comments from South Korea’s financial regulator. On June 22, the head of the Financial Supervisory Service said approval for leveraged single-stock products had been rushed. The statement shook expectations that regulators would continue to support the fast-growing market for such products.
The next day, the KOSPI fell 9.99%, triggering a trading halt. Samsung Electronics and SK Hynix each dropped more than 12%. Despite the sharp decline, margin loans remained close to 38 trillion won, while forced sales reached 42.4 billion won, about double the previous day’s level. Many retail traders continued borrowing to average down rather than reduce exposure.
Market participants described the early phase as “price deleveraging without balance sheet deleveraging.” In simple terms, stock prices were falling sharply, but borrowed positions were not being closed quickly enough to reduce risk across the system.
Leveraged ETFs amplified the shock
The structure of daily leveraged ETFs played a major role in the speed of the downturn. These products must rebalance regularly to maintain their target exposure. In rising markets, they often buy more of the underlying shares. In falling markets, they may need to sell or cut exposure, depending on flows and price movements.
That mechanism helped explain the sharp rebound on June 24 and June 25, when the KOSPI rose 3.26% and 5.42%, respectively. Forced liquidations still reached 110.79 billion won over the two days, but financing balances climbed to a record 38.63 trillion won. The rally was amplified as leveraged ETFs adjusted exposure into a rising market.
The rebound did not resolve the underlying debt problem. Instead, it left margin balances near record highs while volatility continued to rise. The Korean volatility index, VKOSPI, climbed to 97.99, compared with a cited year-end reference level of 28.85. That surge showed how quickly traders were repricing risk after months of heavy concentration in semiconductor shares.
Institutional and foreign funds continued trimming exposure to overheated chip stocks, while retail demand absorbed much of the selling. This created a fragile trading environment. Prices could rebound sharply when ETF flows turned positive, but the same structure left the market vulnerable to another wave of forced selling.
Semiconductor doubts hit the market again
The next major break came on July 1 and July 2, when global semiconductor shares fell as traders began to price in slower artificial intelligence-related spending and possible memory-chip oversupply. The KOSPI fell 2.04% on July 1 and then 7.89% on July 2.
SK Hynix dropped 14.6% across the two-day shock, while Samsung Electronics fell 9.1%. The moves were especially damaging because the two stocks carried such heavy index weight and were deeply embedded in leveraged ETF positions.
The selloff showed that South Korea’s market was exposed to both domestic leverage and global technology sentiment. Even if Korea’s corporate earnings remained strong, any change in expectations for AI spending, chip prices or global memory demand could trigger heavy flows through ETFs and margin accounts.
On July 7, Samsung Electronics delivered a profit forecast that surged 19-fold from a year earlier. Under normal conditions, such a result could have supported the stock. Instead, Samsung shares fell 6.9%. The reaction suggested that traders were focused less on current earnings and more on positioning, debt pressure and the risk of further forced sales.
Credit balances at the time remained near 29.7 trillion won, almost unchanged from late-June levels, even though the KOSPI had already fallen 16% from its peak. The failure of debt to fall in line with prices continued to raise concerns that the market had not completed its deleveraging cycle.
Selling spreads beyond chip stocks
By mid-July, the pressure was no longer limited to Samsung Electronics, SK Hynix or semiconductor-related shares. On July 8, the KOSPI plunged 5.35%, pushing the benchmark into bear-market territory with a decline of more than 20% from its June high.
Forced liquidations accelerated the following day. On July 9, forced sales reached 142.19 billion won, the fourth-highest level on record. That figure highlighted the strain on retail margin accounts and showed how quickly brokerage risk controls were converting unrealized losses into compulsory selling.
The widening of the selloff mattered because it reduced the ability of traders to rotate into other sectors. When weakness spreads broadly, fewer stocks remain available as safe hiding places. That can force accounts to sell stronger holdings simply to meet cash requirements elsewhere.
The pressure also expanded across markets. On July 10, SK Hynix listed a $26.5 billion American depositary receipt, creating new trading links between Seoul, Hong Kong and the United States. The listing added cross-market exposure at a sensitive moment, increasing the potential for time-zone-based arbitrage, overnight rebalancing and rapid changes in global positioning.
Such links can improve access during stable periods, but they can also transmit stress more quickly when markets are moving sharply. A selloff in one region can affect pricing in another before the local market reopens, creating gaps that are difficult for leveraged accounts to manage.
July 13 brings capitulation-style selling
The heaviest single-day pressure came on July 13, when the KOSPI fell 8.95% to 6,806.93 points. The selloff had the characteristics of a capitulation event. Institutional outflows, foreign selling, ETF de-risking and automated stop-loss orders combined to intensify the decline.
Domestic retail traders continued to buy into the weakness, purchasing nearly 3.9 trillion won on the day. That buying may have slowed the decline, but it also meant household accounts were taking on more exposure during one of the most volatile periods in the market.
The following two sessions brought temporary relief. On July 14 and July 15, the KOSPI gained 6.24% after touching an intraday low of 6,448.86 points. The rebound helped stabilize sentiment, but margin debt fell only about 6% from its peak.
That limited decline in debt suggested the bounce was driven largely by technical factors, including ETF rebalancing and short-term positioning, rather than a broad improvement in market fundamentals. With borrowed balances still elevated, the risk of renewed selling remained high.
Policy response marks a new phase
On July 16, South Korean authorities moved more forcefully. The Bank of Korea raised its policy rate by 25 basis points to 2.75%, citing inflation of 3.2% and continued export growth. At the same time, the Financial Services Commission froze new listings of single-stock leveraged ETFs, tightened marketing restrictions and raised the minimum cash deposit requirement from 10 million won to 30 million won.
The measures marked a shift from market-driven deleveraging to a policy-led phase. Regulators appeared to be trying to slow the buildup of new leveraged exposure while forcing traders to hold more cash against risky positions.
The timing was difficult. Higher interest rates increase borrowing costs just as margin traders are already under pressure. Stricter deposit rules may reduce future risk, but they can also force some accounts to raise cash quickly. That creates a delicate balance for authorities trying to restore stability without triggering another round of selling.
The public pressure on regulators also intensified. The Financial Supervisory Service chief faced criticism for allowing highly leveraged single-stock products to expand in a market already dealing with large household debt. The late freeze on new products was viewed by many market participants as an admission that the rapid growth of leveraged ETFs had outpaced oversight.
Strong exports fail to calm the market
The stock collapse came despite signs of strength in South Korea’s real economy. The country reported record export revenue of $102.25 billion for June. Computer chip shipments accounted for $44.82 billion of that total, showing that semiconductor production remained highly profitable even as related share prices fell sharply.
That contrast became one of the defining features of the crisis. Corporate output and exports remained strong, but market structure, leverage and positioning overwhelmed fundamental support. Strong earnings could not offset forced selling when accounts needed cash and leveraged products had to rebalance.
The downturn revealed a liquidity trap inside the equity market. Forced selling destroyed asset values faster than borrowers could reduce short-term loans. Retail traders who refused to close losing positions kept overall margin debt high, leaving the market vulnerable to further shocks.
The stress also had potential implications beyond traditional equities. Around-the-clock digital asset markets can become a source of liquidity when traders need cash outside normal stock-exchange hours. During periods of acute margin stress in Asian markets, liquid holdings in other markets are often sold to meet equity-related obligations. That does not mean digital assets caused the Korean equity decline, but it does show how liquidity pressure can move across asset classes when traders face urgent cash demands.
For South Korea, the immediate question is whether the new policy measures will reduce leverage in an orderly way or accelerate further position closures. By July 16, the data pointed to a crisis driven by overlapping forces: foreign rebalancing, retail margin buying, daily ETF re-exposure, forced liquidation, doubts over the semiconductor earnings cycle and tighter monetary policy.
Those forces fed into one another and turned a concentrated stock-market decline into a broader deleveraging event. Until margin debt falls more decisively and leveraged ETF exposure becomes less concentrated, South Korea’s equity market is likely to remain sensitive to sudden swings in chip shares, policy signals and global risk appetite.
To understand how margin and leverage amplify stock moves, explore our guide what are ETFs and how they work.
Disclaimer: The content on this page is provided for general informational purposes only and does not represent the views or financial advice of Toobit. We make no guarantees regarding the accuracy or completeness of this information and shall not be held liable for any errors, omissions, or outcomes resulting from its use. Investing in digital assets involves risk; users should independently evaluate their financial situation and the risks involved. For further details, please consult our Terms of Service and Risk Disclosure.
