Phathom Pharmaceuticals (PHAT)'s 30-day implied volatility (IV30) was 109.4% at the close on October 23, 2026, up from 62.6% the day before, against a 52-week range of 37.2% to 125.5%. Its 20-day historical volatility was 58.6%.

Key numbers

30-day implied volatility (IV30): 109.4%
IV30 52-week range: 37.2% to 125.5% (median 73.0%)
Historical volatility: 20-day 58.6%, 1-year 67.1%
Implied move by the nearest expiration: ±3.9%

Data as of October 23, 2026.

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

Name: PHAT Implied Volatility
Creator: Market Chameleon