Tomorrow’s US equity options expiry is set to make market history, with a staggering $5 trillion in notional open interest poised to expire. This surpasses the previous record of $4.9 trillion set in December 2023, making it the largest options expiry event to date. A significant driver of this milestone is the record $870 billion in single stock options that are also due to expire.

Key Highlights of the Record-Setting Expiry

Unprecedented Open Interest

The upcoming expiry not only eclipses last year’s record but also underscores the immense scale of participation and hedging activity within the options market. This level of open interest reflects a substantial degree of market positioning and could have significant implications for price movements in the underlying assets.

Single Stock Options Surge

The single stock options component is particularly noteworthy, with $870 billion in notional value. This reflects a surge in interest and activity around individual equities, highlighting investors’ targeted strategies and bets on specific companies. The record-breaking notional value indicates robust market sentiment and heightened speculation in individual stocks.

Massive Long Gamma Positioning

Our data reveals that long gamma positioning is at an all-time high of $10 billion. Gamma, a measure of the rate of change in an option’s delta relative to the underlying asset’s price, indicates the magnitude of exposure to price movements. Long gamma positioning typically suggests that market makers will need to buy underlying assets as prices rise and sell as prices fall, which can stabilize market movements.

Implications for Market Movement

With such substantial gamma exposure, the market could see less volatility in the run-up to the expiry, as market makers adjust their positions to maintain a delta-neutral stance. However, post-expiry, the landscape is expected to shift dramatically. As options roll off, the hedging activities tied to these positions will no longer exert influence on the market, potentially leading to increased price volatility and freer market movement.

Half of the Notional Value to Roll Off

We estimate that approximately half of the total $5 trillion in open interest will roll off following the expiry. This substantial reduction in open interest can lead to decreased trading volume and liquidity in the options market, further contributing to the potential for increased volatility in the underlying assets.

What to Expect Post-Expiry

Starting Monday, with the influence of the current long gamma positioning diminished, we can expect the market to move more freely. This could lead to:

• Increased Volatility: With fewer hedging constraints, the market may experience larger price swings as participants adjust their positions in response to changing market conditions.
• Liquidity Shifts: The rolling off of half of the notional value could impact liquidity, making it potentially more challenging to execute large trades without affecting prices.
• Focus on Fundamentals: As the technical influence of options hedging wanes, market participants might shift their focus back to fundamental drivers such as earnings reports, economic data, and geopolitical developments.

Tomorrow’s US equity options expiry is a historic event that underscores the scale and complexity of the options market. With record-breaking notional values and unprecedented gamma positioning, the expiry is set to be a major milestone. As the market transitions beyond this event, traders and investors should prepare for a potentially more volatile and dynamic environment, where fundamental factors and strategic positioning will play a more prominent role in driving price action.