Southwest Gas Hldgs (SWX)'s 30-day implied volatility (IV30) was 21.0% at the close on November 2, 2026, down from 22.1% the day before, against a 52-week range of 11.7% to 27.5%. Its 20-day historical volatility was 21.2%.

Key numbers

30-day implied volatility (IV30): 21.0%
IV30 52-week range: 11.7% to 27.5% (median 18.4%)
Historical volatility: 20-day 21.2%, 1-year 20.6%
Implied move by the nearest expiration: ±1.5%

Data as of November 2, 2026.

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

Name: SWX Implied Volatility
Creator: Market Chameleon