V-Lab
S&P GSCI Spot Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 7th, 2026
1 Day
20.02%
decreased by 0.68%
1 Week
20.09%
decreased by 0.61%
1 Month
20.37%
decreased by 0.33%
Analysis last updated: Friday, September 4, 2026 at 11:32 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 26 trading days, meaning a shock loses half its impact after approximately 26 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 26-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 126 | |
| αARCH | 0.0587 | 5.52*** |
| βGARCH | 0.9055 | 86.86*** |
| γleverage | 0.0199 | 1.64 |
| λ₁tau intercept | 0.0067 | 1.17 |
| λ₂forecast adj. | 0.0632 | 2.39** |
| λ₃tau persistence | 0.9340 | 32.88*** |
0.974
Persistence26d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 126 | |
α ARCH Response to squared shocks | 0.0587 | 5.52*** |
β GARCH Volatility persistence | 0.9055 | 86.86*** |
γ leverage Additional response to negative shocks | 0.0199 | 1.64 |
λ₁ tau intercept Baseline long-term coefficient | 0.0067 | 1.17 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0632 | 2.39** |
λ₃ tau persistence Long-term factor persistence | 0.9340 | 32.88*** |
Persistence:
0.974
Half-life:
26 days
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