V-Lab
CBOE China ETF Volatility Index Zero Slope Spline-GARCH Volatility Analysis
Inactive
Last recorded values (Monday, February 14th, 2022):
1 Day
111.05%
1 Week
111.95%
1 Month
113.47%
Analysis last updated: Wednesday, September 2, 2026 at 03:47 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 16, 2011 to Feb 11, 2022Model 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 4 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1548 | 7.94*** |
| αARCH | 0.1847 | 4.98*** |
| βGARCH | 0.6699 | 15.13*** |
Spline Coefficients
K=2
| γ1 | 0.0577 | 3.90*** |
| γ2 | -0.0770 | -4.05*** |
0.855
Persistence4d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1548 | 7.94*** |
α ARCH Response to squared shocks | 0.1847 | 4.98*** |
β GARCH Volatility persistence | 0.6699 | 15.13*** |
Spline Coefficients
K=2
| γ1 | 0.0577 | 3.90*** |
| γ2 | -0.0770 | -4.05*** |
Persistence:
0.855
Half-life:
4 days
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