V-Lab
CBOT Rough Rice MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 28th, 2026
1 Day
21.43%
decreased by 0.77%
1 Week
21.70%
decreased by 0.50%
1 Month
22.58%
increased by 0.38%
Analysis last updated: Saturday, September 26, 2026 at 04:13 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 15, 1999 to Sep 25, 2026Model Insight
Volatility shocks decay with a half-life of 23 trading days, meaning a shock loses half its impact after approximately 23 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 23-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 126 | |
| αARCH | 0.0762 | 6.69*** |
| βGARCH | 0.8912 | 73.01*** |
| γleverage | 0.0048 | 0.28 |
| λ₁tau intercept | 0.0027 | 0.67 |
| λ₂forecast adj. | 0.0043 | 0.68 |
| λ₃tau persistence | 0.9946 | 132.26*** |
0.970
Persistence23d
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 | 0.0762 | 6.69*** |
β GARCH Volatility persistence | 0.8912 | 73.01*** |
γ leverage Additional response to negative shocks | 0.0048 | 0.28 |
λ₁ tau intercept Baseline long-term coefficient | 0.0027 | 0.67 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0043 | 0.68 |
λ₃ tau persistence Long-term factor persistence | 0.9946 | 132.26*** |
Persistence:
0.970
Half-life:
23 days
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