Quantify how changes in market implied volatility force automated dealer delta rebalancing. Track the hidden structural flows behind post-event volatility crush rallies and market melt-ups.
Measures rate of change of Delta with respect to Implied Volatility (or rate of change of Vega with respect to spot).
When IV drops post-FOMC or CPI, OTM puts lose delta value, forcing dealers to buy back underlying hedge shorts.
Calculated dynamically across all active expiration cycles using real-time Black-Scholes and SVI volatility surface models.
Estimated dealer delta rebalancing obligations per 1.00% absolute shift in aggregate implied volatility.
| Ticker | Asset Name | Vanna Regime | Net Dollar Vanna | Flow Implication | Terminal |
|---|---|---|---|---|---|
| SPX | S&P 500 Index | Positive Vanna (+IV = Buy) | +$428M / 1% IV | Compressing Rally Bias | View GEX |
| QQQ | Invesco QQQ Trust | Positive Vanna (+IV = Buy) | +$142M / 1% IV | Upward Drift on Vol Crush | View GEX |
| SPY | SPDR S&P 500 ETF | Positive Vanna (+IV = Buy) | +$196M / 1% IV | Compressing Rally Bias | View GEX |
| NVDA | NVIDIA Corporation | High Call Vanna Cluster | +$84M / 1% IV | Post-Earnings Vol Crush Zone | View GEX |
| TSLA | Tesla Inc | Mixed Vanna Profile | -$22M / 1% IV | Vol Spike Selling Pressure | View GEX |
Standard options models focus solely on primary Greeks: Delta (price sensitivity), Gamma (delta sensitivity to price), and Theta (time decay). However, institutional order flow is heavily governed by second-order cross-Greeks, the most critical of which is Vanna.
Because Vanna measures cross-derivative sensitivity, when an asset experiences extreme volatility changes without an immediate underlying price change, market makers still experience massive swings in their aggregate portfolio Delta. To remain delta-neutral, they are legally and mathematically mandated to rebalance by trading underlying cash equities or futures contracts.
During scheduled macroeconomic announcements (Federal Reserve rate decisions, CPI releases) or high-profile earnings, implied volatility surges ahead of the event and collapses immediately after.
When market participants hold heavy put open interest below spot, dealer net Vanna is deeply positive. The moment the event concludes and implied volatility plummets, the delta of those puts contracts instantaneously toward zero. Market makers must buy back their short hedges, resulting in relentless, mechanical index melt-ups even on neutral or mediocre news headlines.
Learn how institutional trading desks leverage second-order Greeks to anticipate non-linear volatility regime shifts.
Gamma measures how much Delta changes when the underlying asset price moves. Vanna measures how much Delta changes when implied volatility moves. Gamma tells you how fast dealers hedge price momentum; Vanna tells you how fast dealers hedge volatility expansion or contraction.
Charm is the rate of change of Delta over time (dDelta/dTime). In the final 48 hours of weekly or monthly options expiration, Charm and Vanna work synergistically: out-of-the-money puts lose delta both from passage of time (Charm) and from implied volatility decay (Vanna), compounding dealer short-covering obligations.
Yes. GEX Horizon continuously parses all active options strikes across major index complexes (SPX, SPY, QQQ) and megacap equities, presenting live strike-by-strike Vanna curves alongside our unified GEX terminal.