Castle Biosciences (CSTL)'s 30-day implied volatility (IV30) was 53.8% at the close on October 16, 2026, up from 41.6% the day before, against a 52-week range of 26.7% to 79.7%. Its 20-day historical volatility was 50.5%.

Key numbers

30-day implied volatility (IV30): 53.8%
IV30 52-week range: 26.7% to 79.7% (median 46.9%)
Historical volatility: 20-day 50.5%, 1-year 51.0%
Implied move by the nearest expiration: ±2.6%

Data as of October 16, 2026.

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

Name: CSTL Implied Volatility
Creator: Market Chameleon