V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
61.04%
decreased by 5.79%
1 Week
60.97%
decreased by 5.86%
1 Month
60.77%
decreased by 6.06%
Analysis last updated: Saturday, August 22, 2026 at 07:59 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 19, 2017 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days. Returns follow a Student-t distribution with v = 4.27 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 | 14.4537 | 5.12*** |
α ARCH Response to squared shocks | 0.1212 | 15.50*** |
β GARCH Volatility persistence | 0.9457 | 83.77*** |
ν DF Student-t tail thickness | 4.2660 | 5.87*** |
Persistence:
0.946
Half-life:
12 days
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