V-Lab
CBOE Google Volatility Index MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 29th, 2026
1 Day
103.39%
increased by 29.69%
1 Week
97.39%
increased by 23.69%
1 Month
94.98%
increased by 21.28%
Analysis last updated: Tuesday, September 29, 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 Sep 25, 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 | 0.3402 | 4.30*** |
| βGARCH | 0.1131 | 1.77* |
| γleverage | 0.0138 | 0.12 |
| λ₁tau intercept | 0.6355 | 0.84 |
| λ₂forecast adj. | 0.0216 | 1.52 |
| λ₃tau persistence | 0.9683 | 43.50*** |
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 | 0.3402 | 4.30*** |
β GARCH Volatility persistence | 0.1131 | 1.77* |
γ leverage Additional response to negative shocks | 0.0138 | 0.12 |
λ₁ tau intercept Baseline long-term coefficient | 0.6355 | 0.84 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0216 | 1.52 |
λ₃ tau persistence Long-term factor persistence | 0.9683 | 43.50*** |
Persistence:
0.460
Half-life:
1 days
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