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V-Lab

CBOE Google Volatility Index GARCH Volatility Analysis

Volatility prediction for Wednesday, September 30th, 2026

1 Day

104.75%

decreased by 0.41%

1 Week

106.79%

increased by 1.63%

1 Month

111.27%

increased by 6.11%

Analysis last updated: Wednesday, September 30, 2026 at 11:35 AM UTC

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Date Range:

from

09/29/2024

to

09/29/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE Google Volatility Index GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 7, 2011 to Sep 25, 2026

Model Insight

Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days.

σ

GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 7-day half-life
ParamValuet-stat
ωconst5.0000
1.82*
αARCH0.0287
2.31**
βGARCH0.8780
15.86***

0.907

Persistence

7d

Half-life
σ

GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
1.82*
α

ARCH

Response to squared shocks

0.0287
2.31**
β

GARCH

Volatility persistence

0.8780
15.86***

Persistence:

0.907

Half-life:

7 days