V-Lab
Xi'An Peri Power Semiconductor Converting Technology Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
76.52%
decreased by 1.18%
1 Week
80.61%
increased by 2.91%
1 Month
86.05%
increased by 8.35%
Analysis last updated: Tuesday, August 25, 2026 at 06:20 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 7, 2020 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 3 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.6257 | 4.94*** |
α ARCH Response to squared shocks | 0.0887 | 2.46** |
β GARCH Volatility persistence | 0.7242 | 6.41*** |
Spline Coefficients
K=9
| γ1 | 3.0252 | 1.25 |
| γ2 | -4.9244 | -1.29 |
| γ3 | 2.8030 | 1.15 |
| γ4 | -2.4045 | -1.28 |
| γ5 | 4.1930 | 2.44** |
| γ6 | -3.0529 | -1.48 |
| γ7 | -2.5078 | -1.15 |
| γ8 | 6.9630 | 4.25*** |
| γ9 | -6.1217 | -3.99*** |
Persistence:
0.813
Half-life:
3 days
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