Southwest Gas Hldgs (SWX)'s 30-day implied volatility (IV30) was 22.7% at the close on November 5, 2026, up from 18.0% the day before, against a 52-week range of 11.7% to 27.5%. Its 20-day historical volatility was 21.4%.

Key numbers

30-day implied volatility (IV30): 22.7%
IV30 52-week range: 11.7% to 27.5% (median 18.4%)
Historical volatility: 20-day 21.4%, 1-year 20.5%
Implied move by the nearest expiration: ±1.2%

Data as of November 5, 2026.

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

Name: SWX Implied Volatility
Creator: Market Chameleon