V-Lab
Samsung Electronics Co Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
87.55%
decreased by 0.73%
1 Week
87.34%
decreased by 0.94%
1 Month
86.51%
decreased by 1.77%
Analysis last updated: Tuesday, September 8, 2026 at 09:17 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Sep 4, 2026Model Insight
With persistence 0.997, volatility shocks have a half-life of 209 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GJR-GARCH Model
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High persistence: persistence 0.997, shock half-life ~209 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0273 | 2.81*** |
| αARCH | 0.0329 | 4.90*** |
| βGARCH | 0.9504 | 177.77*** |
| γleverage | 0.0267 | 1.84* |
0.997
Persistence209d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0273 | 2.81*** |
α ARCH Response to squared shocks | 0.0329 | 4.90*** |
β GARCH Volatility persistence | 0.9504 | 177.77*** |
γ leverage Additional response to negative shocks | 0.0267 | 1.84* |
Persistence:
0.997
Half-life:
209 days
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