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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) (SPX-0DTE-GEX) refers to an institutional financial benchmark and regulatory standard monitored by Cboe Global Markets (US), currently calibrated at 59.0% (Share of SPX Options Volume) as of October 2026.
Updated
Coverage of Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX)
8 articles
0DTE Gamma & Volatility Surface
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): Dealer Delta/Gamma Hedging Equations & E-Mini S&P 500 Futures Impact (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing intraday futures rebalancing per 1%
VIX Term Structure & Skew
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): Partial Derivative Formulas, Scaling Units & Tenor Surface Grid (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing exact Black-Scholes-Merton analytic
Second-Order Greeks & Hedging
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): FOMC & CPI Event Volatility Crush & Forward Variance Decomposition (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing extracting single-day event varianc
OCC Margin & Dispersion Desk
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): Constant-Maturity Contango Roll Drag & Backwardation Flip Triggers (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing daily VX1-to-VX2 roll math ($1,000/
0DTE Gamma & Volatility Surface
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): Clearinghouse Margin Monte Carlo Scenarios & Intraday Call Triggers (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing 99% 2-day Expected Shortfall, 20-mi
VIX Term Structure & Skew
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): 25-Delta Strike Skew, Put Wing Convexity & No-Arbitrage Bounds (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing preventing vertical call-spread and
Second-Order Greeks & Hedging
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): Correlation Spike Stress Audit & Institutional Dispersion Unwinds (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing index variance vs. constituent sing
OCC Margin & Dispersion Desk
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX): 3:50 PM ET Market-on-Close (MOC) Imbalance & 4:00 PM Cash Settlement (59.0% Share of SPX Options Volume Benchmark)
Cboe SPX 0DTE Options Volume (59% Share) & Dealer Gamma Exposure (GEX) (SPX-0DTE-GEX) stands at 59.0% (Share of SPX Options Volume) (Source: Cboe Global Markets, 2026-10-20), governing terminal Charm delta bleed and PM-s