V-Lab
CBOE Google Volatility Index GARCH Volatility Analysis
Volatility prediction for Wednesday, September 30th, 2026
1 Day
104.75%
decreased by 0.41%
1 Week
106.79%
increased by 1.63%
1 Month
111.27%
increased by 6.11%
Analysis last updated: Wednesday, September 30, 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 7 trading days, meaning a shock loses half its impact after approximately 7 days.
σ
GARCH Model
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Shock decay: Shocks decay with a 7-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 1.82* |
| αARCH | 0.0287 | 2.31** |
| βGARCH | 0.8780 | 15.86*** |
0.907
Persistence7d
Half-lifeσ
GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 1.82* |
α ARCH Response to squared shocks | 0.0287 | 2.31** |
β GARCH Volatility persistence | 0.8780 | 15.86*** |
Persistence:
0.907
Half-life:
7 days
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