V-Lab
S&P GSCI Unleaded Gasoline Spot Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
34.13%
decreased by 0.84%
1 Week
34.17%
decreased by 0.80%
1 Month
34.35%
decreased by 0.62%
Analysis last updated: Friday, August 21, 2026 at 11:20 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 32% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0585 | 21.47*** |
α ARCH Response to squared shocks | 0.0577 | 16.38*** |
β GARCH Volatility persistence | 0.9219 | 438.81*** |
γ leverage Additional response to negative shocks | 0.0183 | 3.46*** |
Persistence:
0.989
Half-life:
61 days
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