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0DTE Gamma & Volatility Surface

0DTE Gamma & Volatility Surface research topics and source records from VolSurface Desk. SPX 0DTE options account for 59% of S&P 500 options volume (Source: Cboe Global Markets, 2025-10-10), driving dealer GEX, Vanna, Charm, and OCC 20-minute STANS margining.

Wichtige Institutionelle Erkenntnisse — 0DTE Gamma & Volatility Surface

  • Zero-days-to-expiration (0DTE) contracts represent 59% of total SPX options volume at 2.3 million contracts per day (Source: Cboe Global Markets, 2025-10-10).
  • Dealer Gamma Exposure (GEX) measures the exact S&P 500 notional ($100 multiplier per SPX point) market makers must buy or sell per 1% underlying move to stay delta-neutral (Source: Cboe Options Institute, 2025-10-10).
  • The Options Clearing Corporation (OCC) evaluates clearing member portfolios every 20 minutes via STANS Monte Carlo simulations and enforces a 3-standard-deviation intraday margin call threshold (Source: The Options Clearing Corporation, 2024-09-18).
  • Vanna and Charm govern cross-derivative delta drift across implied volatility shifts and intraday time decay, dictating systematic E-mini S&P 500 (ES) futures rebalancing into the 4:00 PM ET cash close (Source: CME Group, 2025-10-15).
  • Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) prints at 59.0% (Share of SPX Options Volume) under Cboe Global Markets supervision as of 2026-10-20.
  • Cross-benchmark analysis against Vanna (dDelta/dVol) & Charm (dDelta/dTime) Second-Order Dealer Hedging (6.5 hrs Intraday Cash Decay Window, Source: Cboe Options Institute, 2026-10-20) confirms structural divergence across intraday futures rebalancing per 1% SPX move across positive and negative GEX regimes.

Verknüpfte Knowledge-Graph-Entitäten (31)

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Cboe Volatility Index (VIX) (VIX)Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX)Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) — 2026 Standard (SPX-0DTE-GEX-STD)Vanna (dDelta/dVol) & Charm (dDelta/dTime) Second-Order Dealer Hedging (VANNA-CHARM-FLOWS)Vanna (dDelta/dVol) & Charm (dDelta/dTime) Second-Order Dealer Hedging — 2026 Standard (VANNA-CHARM-FLOWS-STD)OCC STANS 20-Minute Intraday Risk Snapshots & 0DTE Margin Add-On (OCC-STANS-MARGIN)OCC STANS 20-Minute Intraday Risk Snapshots & 0DTE Margin Add-On — 2026 Standard (OCC-STANS-MARGIN-STD)Cboe VIX Futures Term Structure (VX1/VX2 Contango vs. Backwardation) (VIX-VX1-VX2-ROLL)Cboe VIX Futures Term Structure (VX1/VX2 Contango vs. Backwardation) — 2026 Standard (VIX-VX1-VX2-ROLL-STD)Cboe 1-Day (VIX1D) & 9-Day (VIX9D) Ultra-Short Volatility Benchmarks (VIX1D-VIX9D-SHORT)Cboe 1-Day (VIX1D) & 9-Day (VIX9D) Ultra-Short Volatility Benchmarks — 2026 Standard (VIX1D-VIX9D-SHORT-STD)S&P 500 Index vs. Single-Stock Implied Correlation & Dispersion Trading (INDEX-DISPERSION)S&P 500 Index vs. Single-Stock Implied Correlation & Dispersion Trading — 2026 Standard (INDEX-DISPERSION-STD)SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW)SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing — 2026 Standard (SPX-25D-SKEW-STD)Third-Order & Cross-Vega Greeks: Vomma (Volga), Zomma & Speed Mechanics (VOMMA-ZOMMA-SPEED)Third-Order & Cross-Vega Greeks: Vomma (Volga), Zomma & Speed Mechanics — 2026 Standard (VOMMA-ZOMMA-SPEED-STD)SABR Stochastic Volatility vs. Gatheral SVI Arbitrage-Free Surface Fitting (SABR-SVI-SURFACE)SABR Stochastic Volatility vs. Gatheral SVI Arbitrage-Free Surface Fitting — 2026 Standard (SABR-SVI-SURFACE-STD)Nasdaq-100 (NDX) vs. SPX Implied Volatility Spread & Tech Gamma Pinning (NDX-QQQ-GAMMA)Nasdaq-100 (NDX) vs. SPX Implied Volatility Spread & Tech Gamma Pinning — 2026 Standard (NDX-QQQ-GAMMA-STD)Cboe VVIX (Volatility of VIX) & Out-of-the-Money VIX Call Convexity (VVIX-VOL-OF-VOL)Cboe VVIX (Volatility of VIX) & Out-of-the-Money VIX Call Convexity — 2026 Standard (VVIX-VOL-OF-VOL-STD)Over-the-Counter SPX Variance Swaps vs. Corridor Variance & Vega Notional (VARIANCE-SWAPS)Over-the-Counter SPX Variance Swaps vs. Corridor Variance & Vega Notional — 2026 Standard (VARIANCE-SWAPS-STD)Institutional Quarterly Equity Collar Rolls & Strike Pinning Microstructure (JPM-COLLAR-HEQT)Institutional Quarterly Equity Collar Rolls & Strike Pinning Microstructure — 2026 Standard (JPM-COLLAR-HEQT-STD)CME SOFR Options & Interest Rate Swaption Normal (Bachelier) Volatility Grid (SOFR-SRO-SWAPTIONS)CME SOFR Options & Interest Rate Swaption Normal (Bachelier) Volatility Grid — 2026 Standard (SOFR-SRO-SWAPTIONS-STD)FINRA Rule 4210 Portfolio Margin vs. Reg T Strategy-Based Options Haircuts (PORTFOLIO-MARGIN-TIMS)FINRA Rule 4210 Portfolio Margin vs. Reg T Strategy-Based Options Haircuts — 2026 Standard (PORTFOLIO-MARGIN-TIMS-STD)

Research-Analysen in diesem Cluster — 0DTE Gamma & Volatility Surface (31)

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Häufig gestellte Fragen (FAQ) — 0DTE Gamma & Volatility Surface

What is the difference between positive Dealer Gamma Exposure (GEX) and negative GEX in SPX 0DTE trading?

Dealer Gamma Exposure (GEX) refers to the net dollar delta hedging obligation of options market makers per 1% move in the S&P 500 Index. In a positive GEX regime, dealers are net long gamma and buy S&P 500 futures into market dips while selling rallies, compressing intraday realized volatility. In a negative GEX regime, dealers are net short gamma and must sell into falling markets and buy into rising markets, amplifying intraday directional velocity.

How do Vanna and Charm flows affect S&P 500 futures hedging alongside Black-Scholes Gamma?

Vanna refers to the sensitivity of option delta with respect to changes in implied volatility (∂Δ/∂σ), whereas Charm (delta decay) refers to the rate of change of option delta with respect to the passage of time (∂Δ/∂t). When Cboe VIX1D compresses intraday during a 1-day session, dealers who are short out-of-the-money SPX puts experience rapid delta decay via Vanna and Charm, requiring systematic buying of E-mini S&P 500 futures.

How does the OCC STANS engine calculate intraday margin risk for 0DTE options?

STANS (System for Theoretical Analysis and Numerical Simulations) refers to the OCC's proprietary Monte Carlo risk engine running 10,000+ joint price and implied volatility scenarios. To capture intraday 0DTE convexity, the OCC records STANS portfolio risk snapshots every 20 minutes during regular trading hours and applies a monthly Intraday Risk Charge plus ad-hoc margin calls when intraday exposure breaches 3 standard deviations above baseline (Source: The Options Clearing Corporation, 2024-09-18).

What is the current SPX-0DTE-GEX benchmark reading and how does Cboe Global Markets define it?

Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) refers to the institutional benchmark and regulatory parameter governed by Cboe Global Markets in US, currently recorded at 59.0% (Share of SPX Options Volume) as of 2026-10-20. It directly dictates intraday futures rebalancing per 1% SPX move across positive and negative GEX regimes.

How does Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) interact with Vanna (dDelta/dVol) & Charm (dDelta/dTime) Second-Order Dealer Hedging in Q4 2026 institutional portfolios?

While SPX-0DTE-GEX is anchored at 59.0% (Share of SPX Options Volume, Source: Cboe Global Markets, 2026-10-20), VANNA-CHARM-FLOWS tracks at 6.5 hrs (Intraday Cash Decay Window, Source: Cboe Options Institute, 2026-10-20). Portfolio managers reconcile both metrics to optimize intraday futures rebalancing per 1% SPX move across positive and negative GEX regimes.

What statutory or quantitative verification frequency is required for SPX-0DTE-GEX?

Institutional desks recalibrate SPX-0DTE-GEX (59.0% Share of SPX Options Volume) against official Cboe Global Markets releases on a daily and quarterly cycle, maintaining a 30-day review cadence alongside OCC-STANS-MARGIN (20 min Intraday Monte Carlo Interval, Source: The Options Clearing Corporation, 2026-10-18).

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