V-Lab
AES Corp/VA GJR-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Monday, September 14th, 2026
1 Day
10.71%
1 Week
11.35%
1 Month
13.60%
Analysis last updated: Friday, September 11, 2026 at 11:40 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 26, 1991 to Sep 11, 2026Model Insight
Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.
Leverage: Negative returns increase volatility 115% more than positive returns
GJR-GARCH Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0279 | 3.72*** |
| αARCH | 0.0416 | 3.89*** |
| βGARCH | 0.9345 | 144.79*** |
| γleverage | 0.0478 | 2.22** |
1.000
Persistence-
Half-lifeGJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0279 | 3.72*** |
α ARCH Response to squared shocks | 0.0416 | 3.89*** |
β GARCH Volatility persistence | 0.9345 | 144.79*** |
γ leverage Additional response to negative shocks | 0.0478 | 2.22** |
Persistence:
1.000
Half-life:
-
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