V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
44.61%
decreased by 1.93%
1 Week
47.34%
increased by 0.80%
1 Month
53.18%
increased by 6.64%
Analysis last updated: Tuesday, September 8, 2026 at 07:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 19, 2017 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2394 | 4.12*** |
| αARCH | 0.1847 | 3.59*** |
| βGARCH | 0.7376 | 16.40*** |
| γleverage | -0.0207 | -0.23 |
0.912
Persistence8d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2394 | 4.12*** |
α ARCH Response to squared shocks | 0.1847 | 3.59*** |
β GARCH Volatility persistence | 0.7376 | 16.40*** |
γ leverage Additional response to negative shocks | -0.0207 | -0.23 |
Persistence:
0.912
Half-life:
8 days
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