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 CNA Financial 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.

CNA Financial IV rank is 21, so implied volatility is in the lower 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 12.7% to 176.6%. See the CNA implied volatility history for a longer view.

Across all open CNA Financial options on Nov 4, 2026, net gamma exposure was $28.9K and net delta exposure was $209.28K per 1% move in the stock. The CNA gamma exposure chart shows where that gamma sits by strike.

CNA Financial Corporation (CNAF) is an insurance holding company that provides commercial property and casualty insurance.