V-Lab
Russell Midcap Index MF2-GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
13.08%
decreased by 0.59%
1 Week
13.38%
decreased by 0.29%
1 Month
14.18%
increased by 0.51%
Analysis last updated: Friday, September 4, 2026 at 11:26 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 1, 2004 to Aug 27, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
MF2-GARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| mwindow | 81 | |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.8561 | 72.03*** |
| γleverage | 0.1861 | 10.91*** |
| λ₁tau intercept | 0.0518 | 2.07** |
| λ₂forecast adj. | 0.3302 | 4.06*** |
| λ₃tau persistence | 0.6262 | 6.69*** |
0.949
Persistence13d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 81 | |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8561 | 72.03*** |
γ leverage Additional response to negative shocks | 0.1861 | 10.91*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0518 | 2.07** |
λ₂ forecast adj. Forecast performance sensitivity | 0.3302 | 4.06*** |
λ₃ tau persistence Long-term factor persistence | 0.6262 | 6.69*** |
Persistence:
0.949
Half-life:
13 days
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