V-Lab
CBOE Apple Volatility Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
77.36%
decreased by 3.36%
1 Week
84.44%
increased by 3.72%
1 Month
98.58%
increased by 17.86%
Analysis last updated: Friday, July 24, 2026 at 11:36 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 7, 2011 to Jul 17, 2026Model Insight
Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days. Returns follow a Student-t distribution with v = 3.30 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 50.3906 | 5.54*** |
α ARCH Response to squared shocks | 0.1084 | 12.48*** |
β GARCH Volatility persistence | 0.9063 | 48.59*** |
ν DF Student-t tail thickness | 3.2969 | 7.39*** |
Persistence:
0.906
Half-life:
7 days
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