SK Hynix Inc GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 29th, 2026
1 Day
86.78%
increased by 3.13%
1 Week
86.66%
increased by 3.01%
1 Month
86.20%
increased by 2.55%
Analysis last updated: Thursday, October 29, 2026 at 11:21 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 26, 1996 to Oct 23, 2026Model Insight
With persistence 0.997, volatility shocks have a half-life of 237 trading days (~0.9 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 ~237 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0470 | 3.23*** |
| αARCH | 0.0315 | 4.85*** |
| βGARCH | 0.9533 | 199.94*** |
| γleverage | 0.0246 | 1.87* |
0.997
Persistence237d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0470 | 3.23*** |
α ARCH Response to squared shocks | 0.0315 | 4.85*** |
β GARCH Volatility persistence | 0.9533 | 199.94*** |
γ leverage Additional response to negative shocks | 0.0246 | 1.87* |
Persistence:
0.997
Half-life:
237 days
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