SPY Greek Exposure
SPY is the SPDR S&P 500 ETF. Gamma (GEX) highlights support/resistance from dealer hedging, Delta (DEX) shows bullish vs bearish bets, Vanna tracks volatility-driven flows, and Charm shows time-decay hedging. Analyze exposure by strike and expiration to find key price levels.
- Name
- SPDR S&P 500 ETF
- Type
- ETF
- Market cap
- $823.11B
- Avg. daily volume (30d)
- 43.35M
Frequently asked questions
- What is SPY gamma exposure (GEX)?
- Gamma exposure (GEX) measures how much market makers must hedge when SPY stock moves. Positive GEX means dealers are long gamma and will hedge in a stabilizing way (buy dips, sell rallies), while negative GEX means their hedging amplifies moves.
- What is SPY delta exposure (DEX)?
- Delta exposure (DEX) shows the net directional options exposure on SPY. It represents how many shares market makers need to buy or sell to stay delta-neutral. Large DEX shifts can indicate significant directional positioning.
- How do SPY Vanna and Charm affect the stock?
- Vanna measures how SPY option deltas change with implied volatility — when IV drops, positive vanna exposure forces dealers to buy shares, creating upward pressure. Charm measures delta decay over time, causing similar hedging flows as options approach expiration.