V-Lab
SK Hynix Inc GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, August 14th, 2026
1 Day
129.00%
decreased by 1.26%
1 Week
128.83%
decreased by 1.43%
1 Month
128.13%
decreased by 2.13%
Analysis last updated: Friday, August 14, 2026 at 07:51 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 26, 1996 to Aug 7, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 363 trading days (~1.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 7.52 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 18.6728 | 8.63*** |
α ARCH Response to squared shocks | 0.0421 | 49.72*** |
β GARCH Volatility persistence | 0.9981 | 4,775.56*** |
ν DF Student-t tail thickness | 7.5173 | 9.07*** |
Persistence:
0.998
Half-life:
363 days
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