S&P GSCI Spot Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, November 2nd, 2026
1 Day
15.80%
decreased by 0.23%
1 Week
16.07%
increased by 0.04%
1 Month
17.04%
increased by 1.01%
Analysis last updated: Friday, October 30, 2026 at 11:06 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 30, 2026Model Insight
Volatility shocks decay with a half-life of 27 trading days, meaning a shock loses half its impact after approximately 27 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 27-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 126 | |
| αARCH | 0.0587 | 5.54*** |
| βGARCH | 0.9058 | 87.38*** |
| γleverage | 0.0198 | 1.64 |
| λ₁tau intercept | 0.0066 | 1.16 |
| λ₂forecast adj. | 0.0623 | 2.37** |
| λ₃tau persistence | 0.9348 | 33.01*** |
0.974
Persistence27d
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 | 5.54*** |
β GARCH Volatility persistence | 0.9058 | 87.38*** |
γ leverage Additional response to negative shocks | 0.0198 | 1.64 |
λ₁ tau intercept Baseline long-term coefficient | 0.0066 | 1.16 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0623 | 2.37** |
λ₃ tau persistence Long-term factor persistence | 0.9348 | 33.01*** |
Persistence:
0.974
Half-life:
27 days
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