V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
55.50%
decreased by 4.43%
1 Week
55.99%
decreased by 3.94%
1 Month
57.24%
decreased by 2.69%
Analysis last updated: Saturday, July 25, 2026 at 11:30 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
This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 33% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9707 | 16.79*** |
α ARCH Response to squared shocks | 0.1748 | 13.64*** |
β GARCH Volatility persistence | 0.7770 | 89.92*** |
γ leverage Additional response to negative shocks | -0.0432 | -2.03** |
Persistence:
0.930
Half-life:
10 days
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