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V-Lab
V-Lab

CBOE China ETF Volatility Index APARCH Volatility Analysis

Inactive

Last recorded values (Monday, February 14th, 2022):

1 Day

100.86%

1 Week

99.65%

1 Month

96.19%

Analysis last updated: Wednesday, September 2, 2026 at 03:49 PM UTC

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graph of CBOE China ETF Volatility Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 16, 2011 to Feb 11, 2022
Boundary Parameters

Model Insight

Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days. The volatility power δ = 1.69 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

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Shock decay: Shocks decay with a 12-day half-lifeδ = 1.69 · sub-quadratic power
ParamValuet-stat
ωconst1.0000
1.33
αARCH0.0970
2.27**
βGARCH0.8458
21.44***
γleverage-0.4822
-1.45
δpower1.6899
4.15***

0.945

Persistence

12d

Half-life
σ

APARCH Model

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ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0000
1.33
α

ARCH

Response to squared shocks

0.0970
2.27**
β

GARCH

Volatility persistence

0.8458
21.44***
γ

leverage

Additional response to negative shocks

-0.4822
-1.45
δ

power

Transformation power

1.6899
4.15***

Persistence:

0.945

Half-life:

12 days