V-Lab
CBOE Google Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 1st, 2026
1 Day
105.39%
increased by 0.64%
1 Week
108.08%
increased by 3.33%
1 Month
114.20%
increased by 9.45%
Analysis last updated: Thursday, October 1, 2026 at 11:35 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 7, 2011 to Sep 25, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 2.31** |
| αARCH | 0.1029 | 1.87* |
| βGARCH | 0.8612 | 20.21*** |
| γleverage | -0.0988 | -1.60 |
0.915
Persistence8d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 2.31** |
α ARCH Response to squared shocks | 0.1029 | 1.87* |
β GARCH Volatility persistence | 0.8612 | 20.21*** |
γ leverage Additional response to negative shocks | -0.0988 | -1.60 |
Persistence:
0.915
Half-life:
8 days
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