V-Lab
CBOE IBM Volatility Index MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 29th, 2026
1 Day
98.31%
1 Week
112.12%
1 Month
120.89%
Analysis last updated: Tuesday, September 29, 2026 at 11:37 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
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.
MF2-GARCH Model
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| Param | Value | t-stat |
|---|---|---|
| mwindow | 126 | |
| αARCH | 0.4734 | 4.64*** |
| βGARCH | 0.3843 | 4.45*** |
| γleverage | -0.4501 | -4.45*** |
| λ₁tau intercept | 10.0000 | 0.13 |
| λ₂forecast adj. | 0.0000 | 0.00 |
| λ₃tau persistence | 0.8359 | 0.61 |
0.633
Persistence2d
Half-lifeMF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 126 | |
α ARCH Response to squared shocks | 0.4734 | 4.64*** |
β GARCH Volatility persistence | 0.3843 | 4.45*** |
γ leverage Additional response to negative shocks | -0.4501 | -4.45*** |
λ₁ tau intercept Baseline long-term coefficient | 10.0000 | 0.13 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0000 | 0.00 |
λ₃ tau persistence Long-term factor persistence | 0.8359 | 0.61 |
Persistence:
0.633
Half-life:
2 days
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