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CBOE Google Volatility Index GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, October 21st, 2026

1 Day

98.41%

decreased by 0.44%

1 Week

102.36%

increased by 3.51%

1 Month

111.15%

increased by 12.30%

Analysis last updated: Wednesday, October 21, 2026 at 01:50 PM UTC

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Date Range:

from

10/20/2024

to

10/20/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE Google Volatility Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 7, 2011 to Oct 16, 2026

Model Insight

Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 8-day half-life
ParamValuet-stat
ωconst5.0000
2.32**
αARCH0.1040
1.89*
βGARCH0.8603
20.22***
γleverage-0.0996
-1.61

0.914

Persistence

8d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
2.32**
α

ARCH

Response to squared shocks

0.1040
1.89*
β

GARCH

Volatility persistence

0.8603
20.22***
γ

leverage

Additional response to negative shocks

-0.0996
-1.61

Persistence:

0.914

Half-life:

8 days