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CBOE Google Volatility Index MF2-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 29th, 2026

1 Day

103.39%

increased by 29.69%

1 Week

97.39%

increased by 23.69%

1 Month

94.98%

increased by 21.28%

Analysis last updated: Tuesday, September 29, 2026 at 11:36 AM UTC

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graph of CBOE Google Volatility Index MF2-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 1 trading day, meaning a shock loses half its impact after approximately 1 day.

σ

MF2-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 1-day half-life
ParamValuet-stat
mwindow66
αARCH0.3402
4.30***
βGARCH0.1131
1.77*
γleverage0.0138
0.12
λ₁tau intercept0.6355
0.84
λ₂forecast adj.0.0216
1.52
λ₃tau persistence0.9683
43.50***

0.460

Persistence

1d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

66
α

ARCH

Response to squared shocks

0.3402
4.30***
β

GARCH

Volatility persistence

0.1131
1.77*
γ

leverage

Additional response to negative shocks

0.0138
0.12
λ₁

tau intercept

Baseline long-term coefficient

0.6355
0.84
λ₂

forecast adj.

Forecast performance sensitivity

0.0216
1.52
λ₃

tau persistence

Long-term factor persistence

0.9683
43.50***

Persistence:

0.460

Half-life:

1 days