V-Lab
S&P GSCI Silver Index GARCH Volatility Analysis
Volatility prediction for Tuesday, October 6th, 2026
1 Day
35.26%
decreased by 0.43%
1 Week
35.25%
decreased by 0.44%
1 Month
35.20%
decreased by 0.49%
Analysis last updated: Monday, October 5, 2026 at 11:09 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 2, 2026Model Insight
With persistence 0.996, volatility shocks have a half-life of 193 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GARCH Model
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High persistence: persistence 0.996, shock half-life ~193 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0159 | 3.89*** |
| αARCH | 0.0407 | 6.96*** |
| βGARCH | 0.9558 | 166.92*** |
0.996
Persistence193d
Half-lifeσ
GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0159 | 3.89*** |
α ARCH Response to squared shocks | 0.0407 | 6.96*** |
β GARCH Volatility persistence | 0.9558 | 166.92*** |
Persistence:
0.996
Half-life:
193 days
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