Spero Therapeutics (SPRO)'s 30-day implied volatility (IV30) was 65.5% at the close on November 3, 2026, up from 54.0% the day before, against a 52-week range of 35.5% to 154.7%. Its 20-day historical volatility was 68.5%.

Key numbers

30-day implied volatility (IV30): 65.5%
IV30 52-week range: 35.5% to 154.7% (median 63.4%)
Historical volatility: 20-day 68.5%, 1-year 62.5%
Implied move by the nearest expiration: ±2.9%

Data as of November 3, 2026.

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

Name: SPRO Implied Volatility
Creator: Market Chameleon