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CBOE VIX Indicative Ask Index GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

107.87%

decreased by 6.34%

1 Week

109.09%

decreased by 5.12%

1 Month

111.74%

decreased by 2.47%

Analysis last updated: Monday, September 14, 2026 at 03:12 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of CBOE VIX Indicative Ask Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 18, 2009 to Sep 11, 2026
Boundary Parameters

Model Insight

This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.

σ

GJR-GARCH Model

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Inverse leverage: volatility responds almost entirely to positive returns
ParamValuet-stat
ωconst5.0000
3.99***
αARCH0.2174
3.63***
βGARCH0.7955
33.13***
γleverage-0.2174
-3.73***

0.904

Persistence

7d

Half-life
σ

GJR-GARCH Model

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ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
3.99***
α

ARCH

Response to squared shocks

0.2174
3.63***
β

GARCH

Volatility persistence

0.7955
33.13***
γ

leverage

Additional response to negative shocks

-0.2174
-3.73***

Persistence:

0.904

Half-life:

7 days