V-Lab
Yw Co Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
32.76%
1 Week
33.23%
1 Month
35.06%
Analysis last updated: Friday, September 11, 2026 at 08:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 11, 2003 to Sep 4, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 693 trading days (~2.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 3.37 degrees of freedom, capturing fatter tails than a normal distribution.
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 66.6027 | 2.00** |
| αARCH | 0.1000 | 26.79*** |
| βGARCH | 0.9990 | 2,072.61*** |
| νDF | 3.3680 | 30.29*** |
0.999
Persistence693d
Half-lifeGAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 66.6027 | 2.00** |
α ARCH Response to squared shocks | 0.1000 | 26.79*** |
β GARCH Volatility persistence | 0.9990 | 2,072.61*** |
ν DF Student-t tail thickness | 3.3680 | 30.29*** |
Persistence:
0.999
Half-life:
693 days
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