S&P GSCI Cotton Index MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, July 21st, 2026
1 Day
24.40%
decreased by 0.83%
1 Week
24.67%
decreased by 0.56%
1 Month
24.96%
decreased by 0.27%
Analysis last updated: Monday, July 20, 2026 at 11:09 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Jul 17, 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 | 0.0632 | 15.61*** |
β GARCH Volatility persistence | 0.7360 | 24.73*** |
γ leverage Additional response to negative shocks | 0.0032 | 0.83 |
λ₁ tau intercept Baseline long-term coefficient | 0.0244 | 1.27 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0576 | 1.83* |
λ₃ tau persistence Long-term factor persistence | 0.9326 | 25.33*** |
Persistence:
0.801
Half-life:
3 days
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