The rise of leveraged ETFs tracking single tech giants is transforming these passive investment tools into a central engine amplifying volatility across global markets. As capital becomes highly concentrated, these products not only magnify the price swings of their underlying stocks and benchmark indices, but the ripple effects are now spreading throughout the global technology sector.

Last week, a 10% plunge in South Korea's Kospi index triggered a global sell-off in tech stocks and dragged the Nasdaq down by 3%. This sharp movement underscored the immense influence of the CSOP SK hynix leveraged ETF. After just nine months since its launch, the fund's assets have ballooned to $13 billion, making it the largest fund of its kind in the world.

On July 2, it was reported that on days of high market volatility, trading in this ETF and its smaller peers can account for up to two-thirds of the total trading volume in SK hynix shares—a staggering figure for a company with a market capitalization of $1.2 trillion. This forces major banks from Wall Street to Hong Kong to meticulously orchestrate complex financing and hedging transactions to keep these products functioning.

As investors rush to bet on the artificial intelligence boom, the global leveraged ETF industry has grown into a massive $270 billion sector. Analysts warn that this one-sided betting is creating a feedback loop. If market momentum reverses, the mechanical rebalancing of these ETFs could trigger rapid selling, posing a direct threat to broader markets.

Rapid Growth Reshapes Daily Trading Dynamics

The CSOP SK hynix ETF's asset size of approximately $13 billion is roughly double the value of SK hynix shares that change hands on an average trading day. Among leveraged ETFs tracking large single stocks, this ratio is at an extreme level. SK hynix holds a hefty 28% weighting in the Kospi index, with its rival Samsung Electronics at 29%, making the stock an increasingly critical barometer for global anxiety over the AI bubble.

This massive scale has altered how professional traders approach the stock. According to market makers, traders now often buy and sell SK hynix shares in the early afternoon, ahead of the leveraged fund's rebalancing, and then close their positions before the market closes. On many trading desks, estimating the ETF's end-of-day rebalancing needs has become as important as analyzing a company's earnings prospects.

Every afternoon, a vast network of banks, hedge funds, and market makers begins preparing for the fund's rebalancing. CSOP lists over 20 counterparties involved in supporting the ETF, including major Wall Street firms. Banks provide swap agreements to create leverage while hedging their risks by purchasing exotic derivatives and managing positions in SK hynix shares, futures, and options.

Soaring Hedging Costs and Systemic Strain

As the product's size continues to expand, the cost of maintaining the world's largest single-stock leveraged ETF is rising, and pressure is building within the financial system.

Sources indicate that banks providing the swap agreements are facing capital constraints. Some are reducing the risk exposure they are willing to offer on SK hynix and charging clients higher fees, while others are encouraging asset managers to hold the shares directly and enter into swap arrangements with the banks. Data shows the annualized cost of derivatives used to hedge against a sharp drop in SK hynix's share price has surged from about 3% in March to over 10%.

These rising costs are directly reflected in the fund's performance. Research estimates that as of June 29, the ETF's year-to-date return was 718%, whereas a theoretical portfolio providing perfect compounding of twice the daily exposure should have returned about 921%. This widening gap reflects the increasing cost of finding and hedging the required exposure. CSOP has also repeatedly warned investors that it may suspend the creation of new ETF units if counterparties reach their risk limits.

A portfolio manager at Janus Henderson commented that the timing is challenging for bank balance sheets, given record-high equity markets, large IPOs, and now the added complexity of the leveraged ETF story.

Crowded Trade and Potential Forced Selling

As money continues to pour in, market participants are growing increasingly wary of how crowded the trade has become. The CEO of CSOP recently acknowledged the trade is "very, very crowded" but stated the firm has strengthened its risk controls as the fund has grown.

The Chief Investment Officer of Lotus Asset Management Ltd. noted he has sold all his positions in the CSOP ETF held since January, citing an overcrowded trade and bearish technical indicators. He pointed out that SK hynix's relative strength is waning, a pattern that often precedes a stock correction or consolidation.

The larger risk lies in mechanical selling if momentum reverses. The CEO of Macro Risk Advisors noted that high returns in tech stocks have created a feedback mechanism on the way up, which works just as powerfully on the way down. A decline in SK hynix and the Kospi could trigger "a lot of very fast selling." A scenario similar to the ETF's 23% drop on June 23, if sustained, could inflict greater market pain.

Meanwhile, the proliferation of leveraged ETFs is drawing attention from global traders and regulators. Nomura strategists estimate that for every 1% move in the market, leveraged ETFs now generate about $9 billion in rebalancing needs. Barclays estimates that recent rebalancing flows from U.S. leveraged ETFs have climbed to several times their long-term average, generating enough buying and selling flow to influence broader market trading.

In South Korea, regulators have expressed regret over approving 16 copycat leveraged ETFs tracking its largest chipmaker in May, stating these products have exacerbated market volatility. Data shows over 90% of investors in these funds are retail traders.

Analysts note that if SK hynix enters a prolonged decline, ETFs would be forced to sell mechanically into a falling market. Given its huge weight in the Kospi, this pressure could rapidly spread to index futures and other derivatives linked to the South Korean market, which is currently the world's seventh largest.

However, analysts also point out that SK hynix's planned $29 billion listing in the United States could increase liquidity in its shares, potentially alleviating some of the impact from leveraged ETF flows.