V-Lab
SK Hynix Inc GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, October 7th, 2026
1 Day
73.58%
1 Week
73.55%
1 Month
73.43%
Analysis last updated: Wednesday, October 7, 2026 at 07:57 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 26, 1996 to Oct 2, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 309 trading days (~1.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 7.44 degrees of freedom, capturing fatter tails than a normal distribution.
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 17.3075 | 2.04** |
| αARCH | 0.0430 | 12.34*** |
| βGARCH | 0.9978 | 1,001.76*** |
| νDF | 7.4364 | 2.28** |
0.998
Persistence309d
Half-lifeGAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 17.3075 | 2.04** |
α ARCH Response to squared shocks | 0.0430 | 12.34*** |
β GARCH Volatility persistence | 0.9978 | 1,001.76*** |
ν DF Student-t tail thickness | 7.4364 | 2.28** |
Persistence:
0.998
Half-life:
309 days
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