Silicon Motion Technology - American Depositary Shares Each Representing Four (SIMO)'s 30-day implied volatility (IV30) was 98.8% at the close on October 27, 2026, down from 100.3% the day before, against a 52-week range of 43.5% to 126.8%. Its 20-day historical volatility was 76.0%.

Key numbers

30-day implied volatility (IV30): 98.8%
IV30 52-week range: 43.5% to 126.8% (median 75.7%)
Historical volatility: 20-day 76.0%, 1-year 77.7%
Implied move by the nearest expiration: ±6.4%

Data as of October 27, 2026.

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

Name: SIMO Implied Volatility
Creator: Market Chameleon