Stem Class A (STEM)'s 30-day implied volatility (IV30) was 94.2% at the close on October 22, 2026, up from 85.8% the day before, against a 52-week range of 66.4% to 143.9%. Its 20-day historical volatility was 96.4%.
Key numbers
30-day implied volatility (IV30): 94.2%
IV30 52-week range: 66.4% to 143.9% (median 113.0%)
Historical volatility: 20-day 96.4%, 1-year 92.0%
Implied move by the nearest expiration: ±5.4%
Data as of October 22, 2026.
STEM Implied Volatility (IV) vs Historical Volatility (HV)
The STEM IV term structure shows the implied volatility difference between different maturity dates.
