V-Lab
S&P GSCI Biofuel Spot Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
18.56%
decreased by 0.29%
1 Week
18.61%
decreased by 0.24%
1 Month
18.94%
increased by 0.09%
Analysis last updated: Saturday, September 19, 2026 at 12:04 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 16, 1995 to Sep 18, 2026Stationarity Enforced
Model Insight
Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 5-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 26 | |
| αARCH | 0.0503 | 4.93*** |
| βGARCH | 0.8090 | 22.96*** |
| γleverage | 0.0184 | 1.32 |
| λ₁tau intercept | 0.0285 | 2.42** |
| λ₂forecast adj. | 0.0726 | 3.39*** |
| λ₃tau persistence | 0.9072 | 31.90*** |
0.868
Persistence5d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 26 | |
α ARCH Response to squared shocks | 0.0503 | 4.93*** |
β GARCH Volatility persistence | 0.8090 | 22.96*** |
γ leverage Additional response to negative shocks | 0.0184 | 1.32 |
λ₁ tau intercept Baseline long-term coefficient | 0.0285 | 2.42** |
λ₂ forecast adj. Forecast performance sensitivity | 0.0726 | 3.39*** |
λ₃ tau persistence Long-term factor persistence | 0.9072 | 31.90*** |
Persistence:
0.868
Half-life:
5 days
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