Aon PLC Class A Ordinary Shares (Ireland) (AON)'s 30-day implied volatility (IV30) was 31.4% at the close on October 27, 2026, down from 34.2% the day before, against a 52-week range of 16.9% to 40.7%. Its 20-day historical volatility was 26.1%.

Key numbers

30-day implied volatility (IV30): 31.4%
IV30 52-week range: 16.9% to 40.7% (median 26.6%)
Historical volatility: 20-day 26.1%, 1-year 25.2%
Implied move by the nearest expiration: ±2.2%

Data as of October 27, 2026.

AON Implied Volatility (IV) vs Historical Volatility (HV)

Name: AON Implied Volatility
Creator: Market Chameleon