S&P GSCI All Cattle Spot Index AGARCH Volatility Analysis
Volatility prediction for Thursday, October 15th, 2026
1 Day
16.04%
decreased by 0.02%
1 Week
16.03%
decreased by 0.03%
1 Month
16.02%
decreased by 0.04%
Analysis last updated: Wednesday, October 14, 2026 at 11:02 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 7, 2002 to Oct 9, 2026Model Insight
The news-impact curve is shifted (γ = 0.52) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.
σ
AGARCH Model
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Asymmetry: negative returns raise volatility more
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0023 | 0.60 |
| αARCH | 0.0436 | 7.95*** |
| βGARCH | 0.9424 | 146.20*** |
| γleverage | 0.5190 | 5.46*** |
0.986
Persistence49d
Half-lifeσ
AGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0023 | 0.60 |
α ARCH Response to squared shocks | 0.0436 | 7.95*** |
β GARCH Volatility persistence | 0.9424 | 146.20*** |
γ leverage Additional response to negative shocks | 0.5190 | 5.46*** |
Persistence:
0.986
Half-life:
49 days
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