Protagonist Therapeutics (PTGX)'s 30-day implied volatility (IV30) was 38.2% at the close on October 27, 2026, down from 38.4% the day before, against a 52-week range of 33.2% to 70.6%. Its 20-day historical volatility was 42.4%.

Key numbers

30-day implied volatility (IV30): 38.2%
IV30 52-week range: 33.2% to 70.6% (median 44.3%)
Historical volatility: 20-day 42.4%, 1-year 44.5%
Implied move by the nearest expiration: ±2.4%

Data as of October 27, 2026.

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

Name: PTGX Implied Volatility
Creator: Market Chameleon