V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. EGARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
48.66%
decreased by 1.10%
1 Week
50.38%
increased by 0.62%
1 Month
54.62%
increased by 4.86%
Analysis last updated: Friday, September 4, 2026 at 06:33 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 19, 2017 to Aug 28, 2026Model Insight
Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2411 | 4.27*** |
α ARCH Response to squared shocks | 0.2940 | 6.18*** |
β GARCH Volatility persistence | 0.9091 | 42.00*** |
γ leverage Additional response to negative shocks | 0.0181 | 0.40 |
Persistence:
0.909
Half-life:
7 days
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