V-Lab
General Electric Co GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
33.85%
decreased by 0.77%
1 Week
33.89%
decreased by 0.73%
1 Month
34.06%
decreased by 0.56%
Analysis last updated: Friday, September 18, 2026 at 11:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 404 trading days (~1.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 267% more than positive returns
σ
GJR-GARCH Model
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High persistence: persistence 0.998, shock half-life ~404 daysLeverage: Negative returns increase volatility 267% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0136 | 2.11** |
| αARCH | 0.0195 | 2.82*** |
| βGARCH | 0.9528 | 177.34*** |
| γleverage | 0.0520 | 3.31*** |
0.998
Persistence404d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0136 | 2.11** |
α ARCH Response to squared shocks | 0.0195 | 2.82*** |
β GARCH Volatility persistence | 0.9528 | 177.34*** |
γ leverage Additional response to negative shocks | 0.0520 | 3.31*** |
Persistence:
0.998
Half-life:
404 days
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