V-Lab
Capitalonline Data Service Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
70.35%
increased by 2.39%
1 Week
70.37%
increased by 2.41%
1 Month
70.46%
increased by 2.50%
Analysis last updated: Tuesday, August 25, 2026 at 06:23 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 1, 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 23 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0825 | 4.46*** |
α ARCH Response to squared shocks | 0.0876 | 3.77*** |
β GARCH Volatility persistence | 0.8828 | 27.50*** |
Spline Coefficients
K=1
| γ1 | 0.0042 | 0.31 |
Persistence:
0.970
Half-life:
23 days
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