V-Lab
Chevron Corp GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
19.58%
decreased by 0.05%
1 Week
19.78%
increased by 0.15%
1 Month
20.48%
increased by 0.85%
Analysis last updated: Monday, September 14, 2026 at 09:46 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 178% more than equivalent positive returns.
σ
GJR-GARCH Model
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Leverage: Negative returns increase volatility 178% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0421 | 5.16*** |
| αARCH | 0.0341 | 4.14*** |
| βGARCH | 0.9182 | 114.44*** |
| γleverage | 0.0609 | 3.22*** |
0.983
Persistence40d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0421 | 5.16*** |
α ARCH Response to squared shocks | 0.0341 | 4.14*** |
β GARCH Volatility persistence | 0.9182 | 114.44*** |
γ leverage Additional response to negative shocks | 0.0609 | 3.22*** |
Persistence:
0.983
Half-life:
40 days
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