V-Lab
CBOE Google Volatility Index MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
76.37%
decreased by 2.45%
1 Week
89.43%
increased by 10.61%
1 Month
94.52%
increased by 15.70%
Analysis last updated: Monday, September 7, 2026 at 11:40 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 7, 2011 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 1 trading day, meaning a shock loses half its impact after approximately 1 day.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 1-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 66 | |
| αARCH | 0.3412 | 4.30*** |
| βGARCH | 0.1138 | 1.77* |
| γleverage | 0.0090 | 0.08 |
| λ₁tau intercept | 0.6900 | 0.83 |
| λ₂forecast adj. | 0.0213 | 1.48 |
| λ₃tau persistence | 0.9678 | 41.16*** |
0.460
Persistence1d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 66 | |
α ARCH Response to squared shocks | 0.3412 | 4.30*** |
β GARCH Volatility persistence | 0.1138 | 1.77* |
γ leverage Additional response to negative shocks | 0.0090 | 0.08 |
λ₁ tau intercept Baseline long-term coefficient | 0.6900 | 0.83 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0213 | 1.48 |
λ₃ tau persistence Long-term factor persistence | 0.9678 | 41.16*** |
Persistence:
0.460
Half-life:
1 days
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