Explosive growth of leveraged ETFs can no longer be ignored for its impact on US stocks.

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In recent years, the size of leveraged ETFs in the US has expanded rapidly. While amplifying market liquidity, they have also become an important force influencing the structure of US stock trading. As more and more capital flows into leveraged and inverse leveraged equity ETFs, the scale of rebalancing trades before daily closing continues to set records. Their pro-cyclical trading mechanisms are amplifying market volatility and intensifying late-day price fluctuations.

Bloomberg macro strategist Simon White recently pointed out in his latest article that the total assets of US leveraged and inverse leveraged equity ETFs are approaching $200 billion. On some trading days, the buying and selling demand from rebalancing alone exceeds $50 billion, setting a historic high. Even when normalized against the average daily trading volume of e-mini S&P 500 futures, the proportion of rebalancing funds in total market volume remains at a historic peak, indicating that the growth rate of this force has already surpassed the expansion of overall market liquidity.

White believes leveraged ETFs inherently have a "short gamma" characteristic: they must continue buying when the market rises, and are forced to sell when the market falls. Their trading behavior pushes volatility further in the direction of the market. This may not only explain the recent phenomenon of US stock gamma more frequently and deeply entering negative territory, but also means that leveraged ETFs are gradually evolving into structural factors affecting market stability.

Scale Nears $200 Billion; Rebalancing Funds Set Historic Highs

Leveraged ETFs are not new products—they have a development history of almost twenty years—but explosive growth has truly happened in recent years.

According to Bloomberg statistics, the total market capitalization of all US leveraged and inverse leveraged equity ETFs is now close to $200 billion, a historic high. The most concentrated funds are primarily in technology growth sectors, including triple-long semiconductor ETFs, triple-long Micron Technology ETFs, triple-long technology stock ETFs, and double-long products like SanDisk and Tesla, indicating investor demand for leveraged exposure to technology and AI assets continues to heat up.

Compared to regular ETFs, leveraged ETFs must deal with conventional demands for rebalancing due to creation/redemption and index adjustments, but also must maintain their set leverage multiple daily, requiring continuous adjustment of holdings regardless of market fluctuations.

This also gives their trading a natural pro-cyclical characteristic.

For long leveraged ETFs, after a stock market rise, fund NAV increases, actual leverage ratio declines, and the fund must continue buying underlying assets to restore target leverage; conversely, when the market falls, assets must be sold to reduce risk exposure. Although inverse leveraged ETFs operate in the opposite direction, they similarly require mechanical rebalancing after price fluctuations.

"Short Gamma" Characteristics Amplify Market Volatility

It’s precisely this mechanical rebalancing mechanism that makes leveraged ETFs structurally similar to holding long-term "short gamma" positions.

Short gamma refers to positions needing to constantly chase the market by buying high and selling low, rather than trading contrarily, thereby further amplifying price volatility. When the market rises, forced buying continues; when the market falls, forced selling must continue, intensifying the original trend.

White points out that this mechanism helps explain the recent phenomenon of the market's gamma value entering negative territory faster and deeper, with leveraged ETFs as one of the significant driving forces.

More noteworthy is that these rebalancing trades are usually concentrated in the last few minutes before the close, making their impact on late-day liquidity and price volatility particularly acute. When market liquidity itself is insufficient, large-scale concentrated buying and selling can even further amplify late-day price movements.

White further points out that, even after excluding the overall growth in market trading volume and using e-mini S&P 500 futures volume as a standardized measure, the importance of leveraged ETF rebalancing flows remains at a historic high. This means their impact is not only in absolute scale expansion, but the speed at which they penetrate overall market structure continues to accelerate.

Risk Warning and DisclaimerThe market involves risks; investment requires caution. This article does not constitute personal investment advice and does not take into account individual users’ special investment objectives, financial situations, or needs. Users should consider whether any opinions, perspectives, or conclusions in this article fit their specific circumstances. Investing accordingly is at your own risk. ```