Benchmark or product
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing — 2026 StandardSPX-25D-SKEW-STD
SPX-25D-SKEW 2026 Institutional Benchmark Framework is defined as the standardized quantitative and compliance methodology published by Cboe Exchange governing SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing across US capital markets (148.5 Cboe SKEW Index Level, October 2026).
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Coverage of SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing — 2026 Standard
8 articles
Second-Order Greeks & Hedging
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: Dealer Delta/Gamma Hedging Equations & E-Mini S&P 500 Futures Impact (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing intraday futures rebalancing per 1% SPX move
OCC Margin & Dispersion Desk
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: Partial Derivative Formulas, Scaling Units & Tenor Surface Grid (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing exact Black-Scholes-Merton analytical deriva
0DTE Gamma & Volatility Surface
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: FOMC & CPI Event Volatility Crush & Forward Variance Decomposition (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing extracting single-day event variance weights
VIX Term Structure & Skew
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: Constant-Maturity Contango Roll Drag & Backwardation Flip Triggers (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing daily VX1-to-VX2 roll math ($1,000/pt multip
Second-Order Greeks & Hedging
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: Clearinghouse Margin Monte Carlo Scenarios & Intraday Call Triggers (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing 99% 2-day Expected Shortfall, 20-minute risk
OCC Margin & Dispersion Desk
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: 25-Delta Strike Skew, Put Wing Convexity & No-Arbitrage Bounds (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing preventing vertical call-spread and horizont
0DTE Gamma & Volatility Surface
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: Correlation Spike Stress Audit & Institutional Dispersion Unwinds (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing index variance vs. constituent single-stock
VIX Term Structure & Skew
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing: 3:50 PM ET Market-on-Close (MOC) Imbalance & 4:00 PM Cash Settlement (148.5 Cboe SKEW Index Level Benchmark)
SPX 25-Delta Put-Call Skew, Risk Reversals & Cboe SKEW Index Tail Pricing (SPX-25D-SKEW) stands at 148.5 (Cboe SKEW Index Level) (Source: Cboe Exchange, 2026-10-20), governing terminal Charm delta bleed and PM-settled SP