Idt Class B (IDT)'s 30-day implied volatility (IV30) was 31.1% at the close on October 21, 2026, up from 28.4% the day before, against a 52-week range of 18.7% to 49.5%. Its 20-day historical volatility was 35.5%.
Key numbers
30-day implied volatility (IV30): 31.1%
IV30 52-week range: 18.7% to 49.5% (median 29.1%)
Historical volatility: 20-day 35.5%, 1-year 30.8%
Implied move by the nearest expiration: ±1.8%
Data as of October 21, 2026.
IDT Implied Volatility (IV) vs Historical Volatility (HV)
The IDT IV term structure shows the implied volatility difference between different maturity dates.
