V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
61.49%
decreased by 6.92%
1 Week
61.38%
decreased by 7.03%
1 Month
61.08%
decreased by 7.33%
Analysis last updated: Saturday, July 25, 2026 at 11:31 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 19, 2017 to Jul 24, 2026Model Insight
Volatility shocks decay with a half-life of 13 trading days, meaning a shock loses half its impact after approximately 13 days. Returns follow a Student-t distribution with v = 4.37 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 | 14.4776 | 5.20*** |
α ARCH Response to squared shocks | 0.1223 | 15.93*** |
β GARCH Volatility persistence | 0.9482 | 89.84*** |
ν DF Student-t tail thickness | 4.3750 | 5.88*** |
Persistence:
0.948
Half-life:
13 days
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