State Street SPDR Bloomberg 3-12 Month T-Bill ETF (BILS)'s 30-day implied volatility (IV30) was 0.9% at the close on October 19, 2026, against a 52-week range of 0.7% to 10.2%. Its 20-day historical volatility was 0.4%.
Key numbers
30-day implied volatility (IV30): 0.9%
IV30 52-week range: 0.7% to 10.2% (median 6.8%)
Historical volatility: 20-day 0.4%, 1-year 0.3%
Implied move by the nearest expiration: ±0.1%
Data as of October 19, 2026.
BILS Implied Volatility (IV) vs Historical Volatility (HV)
The BILS IV term structure shows the implied volatility difference between different maturity dates.
