V-Lab
Samsung Electronics Co Ltd EGARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
77.70%
increased by 0.38%
1 Week
77.33%
increased by 0.01%
1 Month
75.94%
decreased by 1.38%
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 0.994, volatility shocks have a half-life of 110 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 44% more than positive returns
σ
EGARCH Model
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High persistence: persistence 0.994, shock half-life ~110 daysLeverage: Negative returns increase volatility 44% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0152 | 3.57*** |
| αARCH | 0.1091 | 9.69*** |
| βGARCH | 0.9937 | 530.82*** |
| γleverage | -0.0195 | -2.05** |
0.994
Persistence110d
Half-lifeσ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0152 | 3.57*** |
α ARCH Response to squared shocks | 0.1091 | 9.69*** |
β GARCH Volatility persistence | 0.9937 | 530.82*** |
γ leverage Additional response to negative shocks | -0.0195 | -2.05** |
Persistence:
0.994
Half-life:
110 days
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