Notes · Aug 19, 2026
SPY 0DTE Options Market Dynamics Amid Rising Volatility
Educational only. Not investment advice. Not a trade recommendation.
When Oil Prices Rise, Why Do Stocks Keep Climbing?
As oil prices continue to increase, many traders are left wondering how the S&P 500 can maintain its upward momentum. The answer lies in the complex interplay between dealer gamma, expected move, and volatility regime. When oil prices rise, it can lead to increased inflation expectations, which in turn can cause a shift in the volatility regime. This shift can result in a change in the expected move, making it more likely for the market to experience larger price swings.
A rails-first trader would be closely monitoring the Confluence Flow Index (CFI) to gauge the real-time dealer hedging flow and its impact on the market. By analyzing the CFI, traders can gain insights into the dealer's positioning and adjust their strategy accordingly. For more information on how to use the CFI in your trading decisions, visit our dealer gamma explainer to learn more about the mechanics behind dealer hedging and its effects on the market.
Understanding the Role of Dealer Gamma
Dealer gamma plays a crucial role in shaping the market's behavior, especially when it comes to the S&P 500. When the market is pinned near a call wall, dealers are more likely to be short gamma, which means they will be buying stocks to hedge their positions. This buying pressure can help propel the market higher, even in the face of rising oil prices. On the other hand, if the market is trading below a put wall, dealers are more likely to be long gamma, which means they will be selling stocks to hedge their positions, potentially leading to a market downturn.
- If the market is trading near a gamma flip level, the dealers' hedging activity can become more aggressive, leading to increased volatility.
- A call wall above the current market price can provide a level of support, as dealers buy stocks to hedge their positions.
- A put wall below the current market price can provide a level of resistance, as dealers sell stocks to hedge their positions.
Expected Move and Volatility Regime
The expected move is a critical component in understanding the market's behavior, especially when it comes to the S&P 500. When the expected move is high, it can lead to increased volatility, making it more likely for the market to experience larger price swings. The volatility regime is also closely tied to the expected move, as a shift in the regime can result in a change in the expected move. A rails-first trader would be closely monitoring the expected move and volatility regime to adjust their strategy accordingly.
| Volatility Regime | Expected Move | Market Behavior |
|---|---|---|
| Low | Low | Range-bound trading |
| Medium | Medium | Trend-following behavior |
| High | High | Increased volatility and larger price swings |
Session Behavior and Market Outlook
A rails-first trader would be closely monitoring the session behavior to gauge the market's outlook. If the market is trading above the opening range, it can be a sign of a bullish outlook, while trading below the opening range can indicate a bearish outlook. The market's behavior around key levels, such as call and put walls, can also provide valuable insights into the market's outlook.
In conclusion, the S&P 500's ability to maintain its upward momentum despite rising oil prices can be attributed to the complex interplay between dealer gamma, expected move, and volatility regime. By closely monitoring these factors and adjusting their strategy accordingly, a rails-first trader can gain a competitive edge in the market. As you continue to refine your trading strategy, consider exploring the Confluence Decision Desk to stay up-to-date on the latest market developments and insights.
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Educational content only. Options involve substantial risk.