V-Lab
Zeng Hsing Industrial Co Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
36.34%
increased by 3.02%
1 Week
36.45%
increased by 3.13%
1 Month
36.85%
increased by 3.53%
Analysis last updated: Tuesday, August 25, 2026 at 08:18 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 18, 2007 to Aug 21, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 518 trading days (~2.1 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 3.22 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 | 16.2613 | 7.77*** |
α ARCH Response to squared shocks | 0.0777 | 83.44*** |
β GARCH Volatility persistence | 0.9987 | 6,360.92*** |
ν DF Student-t tail thickness | 3.2229 | 84.41*** |
Persistence:
0.999
Half-life:
518 days
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