V-Lab
CBOE Apple Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
89.25%
decreased by 1.33%
1 Week
93.09%
increased by 2.51%
1 Month
100.60%
increased by 10.02%
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
This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 11.96*** |
α ARCH Response to squared shocks | 0.1614 | 11.77*** |
β GARCH Volatility persistence | 0.8102 | 87.55*** |
γ leverage Additional response to negative shocks | -0.1614 | -11.51*** |
Persistence:
0.891
Half-life:
6 days
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