V-Lab
Zhejiang E-P Equipment Co Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
25.78%
decreased by 0.08%
1 Week
30.15%
increased by 4.29%
1 Month
33.01%
increased by 7.15%
Analysis last updated: Tuesday, August 25, 2026 at 06:05 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 24, 2024 to Aug 21, 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 2 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1379 | 4.01*** |
α ARCH Response to squared shocks | 0.3273 | 2.77*** |
β GARCH Volatility persistence | 0.3190 | 2.43** |
Spline Coefficients
K=1
| γ1 | 0.1658 | 0.98 |
Persistence:
0.646
Half-life:
2 days
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