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V-Lab
V-Lab

CBOE China ETF Volatility Index GAS-GARCH Student T Volatility Analysis

Inactive

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

1 Day

113.72%

1 Week

110.57%

1 Month

102.92%

Analysis last updated: Wednesday, September 2, 2026 at 03:47 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of CBOE China ETF Volatility Index GAS-GARCH-T

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

Model Insight

Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days. Returns follow a Student-t distribution with v = 4.99 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 7-day half-lifev = 4.99 · fat tails
ParamValuet-stat
ωconst34.2092
3.21***
αARCH0.1579
5.51***
βGARCH0.9103
34.37***
νDF4.9914
1.98**

0.910

Persistence

7d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

34.2092
3.21***
α

ARCH

Response to squared shocks

0.1579
5.51***
β

GARCH

Volatility persistence

0.9103
34.37***
ν

DF

Student-t tail thickness

4.9914
1.98**

Persistence:

0.910

Half-life:

7 days