V-Lab
S&P GSCI Cotton Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, August 31st, 2026
1 Day
23.97%
decreased by 0.82%
1 Week
23.57%
decreased by 1.22%
1 Month
23.73%
decreased by 1.06%
Analysis last updated: Friday, August 28, 2026 at 11:10 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 28, 2026Model Insight
Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days.
σ
MF2-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 21 | |
α ARCH Response to squared shocks | 0.0624 | 5.09*** |
β GARCH Volatility persistence | 0.7449 | 14.20*** |
γ leverage Additional response to negative shocks | 0.0026 | 0.18 |
λ₁ tau intercept Baseline long-term coefficient | 0.0238 | 3.23*** |
λ₂ forecast adj. Forecast performance sensitivity | 0.0562 | 5.33*** |
λ₃ tau persistence Long-term factor persistence | 0.9343 | 73.40*** |
Persistence:
0.809
Half-life:
3 days
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