S&P GSCI Light Energy Spot Index AGARCH Volatility Analysis
Volatility prediction for Thursday, July 16th, 2026
1 Day
13.17%
decreased by 0.23%
1 Week
13.20%
decreased by 0.20%
1 Month
13.31%
decreased by 0.09%
Analysis last updated: Wednesday, July 15, 2026 at 11:04 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Jul 10, 2026Model Insight
With persistence 0.997, volatility shocks have a half-life of 202 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
AGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0038 | 16.88*** |
α ARCH Response to squared shocks | 0.0548 | 38.50*** |
β GARCH Volatility persistence | 0.9418 | 667.45*** |
γ leverage Additional response to negative shocks | -0.0052 | -0.45 |
Persistence:
0.997
Half-life:
202 days
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