Notes · Aug 18, 2026
Market Volatility Driven By Interest Rates And Gamma Walls
Educational only. Not investment advice. Not a trade recommendation.
When Interest Rates Drive Market Volatility, 0DTE Options Structure Shifts
As Group One's Michael Palmer notes, interest rates have become a primary catalyst of market volatility. This shift in focus has significant implications for the 0DTE options structure, particularly in how dealer gamma and expected move are affected. When interest rates are on the move, dealers must adjust their hedging strategies, which in turn impacts the overall market volatility.
A key aspect to consider is how changes in interest rates influence the cost of borrowing and, by extension, the attractiveness of certain options strikes. If interest rates rise, the cost of borrowing increases, making it more expensive for dealers to maintain long positions. This can lead to a decrease in dealer gamma, as they reduce their exposure to mitigate potential losses. Conversely, a decrease in interest rates can increase dealer gamma, as the cost of borrowing decreases, making it more economical for dealers to hold long positions.
Expected Move and Vol Regime
The expected move, a critical component of 0DTE options structure, is also influenced by changes in interest rates. As interest rates fluctuate, the expected move can expand or contract, depending on the direction and magnitude of the rate change. For instance, if interest rates are increasing, the expected move may expand, as traders and dealers anticipate greater market volatility. This, in turn, can lead to a shift in the vol regime, with the market transitioning from a low-volatility environment to a high-volatility environment.
To better understand the relationship between interest rates, dealer gamma, and expected move, it's essential to consider the Confluence Flow Index (CFI), which provides insights into real-time dealer hedging flow. By analyzing the CFI, traders can gain a deeper understanding of how dealers are positioning themselves in response to changes in interest rates, and how this impacts the overall market volatility. For more information on the CFI and its application in 0DTE options trading, visit the Confluence Learn page to explore in-depth explainers and resources.
Session Behavior and Dealer Positioning
Changes in interest rates can also impact session behavior, particularly in how dealers position themselves during different times of the trading day. For example, if interest rates are expected to increase, dealers may be more inclined to sell calls and buy puts during the morning session, in anticipation of a potential market decline. Conversely, if interest rates are expected to decrease, dealers may be more likely to buy calls and sell puts, anticipating a potential market rally.
| Interest Rate Change | Expected Move | Dealer Gamma | Session Behavior |
|---|---|---|---|
| Increasing | Expands | Decreases | Sell calls, buy puts |
| Decreasing | Contracts | Increases | Buy calls, sell puts |
Practical Takeaways
In conclusion, when interest rates drive market volatility, 0DTE options structure shifts in response. Traders must be aware of these changes and adjust their strategies accordingly. Two key takeaways are: first, monitor changes in interest rates and their impact on dealer gamma and expected move; second, consider the Confluence Flow Index (CFI) to gain insights into real-time dealer hedging flow. By doing so, traders can refine their understanding of the 0DTE options market and make more informed decisions. To further develop your skills in navigating 0DTE options, explore the Confluence Decision Desk, where you can access real-time data and analysis to inform your trading decisions.
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Educational content only. Options involve substantial risk.