Option Greeks measure how an option's price responds to changes in the stock price (delta and gamma), time (theta), implied volatility (vega), and interest rates (rho).

Gamma, theta, and vega are largest for strikes near the Cboe Global Markets stock price and shrink for strikes far above or below it. Theta grows as expiration gets closer, while vega is larger for expirations further out. Call delta runs from 0 to 1 and put delta from -1 to 0, near 0.50 and -0.50 at the money, and roughly estimates the chance that an option finishes in the money.

Cboe Global Markets IV rank is 72, so implied volatility is in the upper part of its one-year range. Higher implied volatility raises option premiums and daily time decay (theta), and spreads delta and gamma across a wider range of strikes. Over the past year, 30-day implied volatility ranged from 16.9% to 44.7%. See the CBOE implied volatility history for a longer view.

Across all open Cboe Global Markets options on Nov 4, 2026, net gamma exposure was $12.03M and net delta exposure was $573.97M per 1% move in the stock. The CBOE gamma exposure chart shows where that gamma sits by strike.

Founded in 1973, Cboe controls the largest option exchange in the US, which provides around 60% of the firm's revenue.