Cullen/Frost Bankers (CFR)'s 30-day implied volatility (IV30) was 28.4% at the close on October 23, 2026, up from 26.9% the day before, against a 52-week range of 18.3% to 34.7%. Its 20-day historical volatility was 18.9%.
Data as of October 23, 2026.