V-Lab
SK Hynix Inc GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
141.28%
decreased by 4.44%
1 Week
141.08%
decreased by 4.64%
1 Month
140.26%
decreased by 5.46%
Analysis last updated: Wednesday, August 5, 2026 at 07:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 26, 1996 to Jul 31, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 364 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 = 7.51 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 | 18.7284 | 8.64*** |
α ARCH Response to squared shocks | 0.0421 | 49.79*** |
β GARCH Volatility persistence | 0.9981 | 4,775.58*** |
ν DF Student-t tail thickness | 7.5083 | 9.10*** |
Persistence:
0.998
Half-life:
364 days
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