iShares U.S. Treasury Bond ETF (GOVT)'s 30-day implied volatility (IV30) was 5.1% at the close on October 28, 2026, down from 9.4% the day before, against a 52-week range of 2.8% to 11.5%. Its 20-day historical volatility was 4.8%.

Key numbers

30-day implied volatility (IV30): 5.1%
IV30 52-week range: 2.8% to 11.5% (median 5.0%)
Historical volatility: 20-day 4.8%, 1-year 3.8%
Implied move by the nearest expiration: ±0.6%

Data as of October 28, 2026.

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

Name: GOVT Implied Volatility
Creator: Market Chameleon