V-Lab
Hangzhou Prevail Optoelectronic Equipment Co., Ltd. Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
59.41%
decreased by 4.99%
1 Week
60.73%
decreased by 3.67%
1 Month
63.65%
decreased by 0.75%
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 model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 7 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.4134 | 6.37*** |
α ARCH Response to squared shocks | 0.1667 | 5.30*** |
β GARCH Volatility persistence | 0.7424 | 18.77*** |
Spline Coefficients
K=2
| γ1 | 0.0824 | 2.61*** |
| γ2 | -0.1050 | -2.61*** |
Persistence:
0.909
Half-life:
7 days
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