Skip to main content
V-Lab
V-Lab

CBOE Brazil ETF Volatility Index AGARCH Volatility Analysis

Volatility prediction for Friday, September 11th, 2026

1 Day

81.28%

decreased by 6.48%

1 Week

81.76%

decreased by 6.00%

1 Month

82.51%

decreased by 5.25%

Analysis last updated: Saturday, September 12, 2026 at 12:48 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE Brazil ETF Volatility Index AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 16, 2011 to Sep 10, 2026

Model Insight

The news-impact curve is shifted (γ = -2.84) so that positive returns raise next-day volatility more than negative returns of the same size. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and rare among risky assets.

σ

AGARCH Model

Tap to view equation

Asymmetry: positive returns raise volatility more
ParamValuet-stat
ωconst3.4113
4.60***
αARCH0.1326
4.46***
βGARCH0.7035
19.78***
γleverage-2.8365
-3.31***

0.836

Persistence

4d

Half-life
σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

3.4113
4.60***
α

ARCH

Response to squared shocks

0.1326
4.46***
β

GARCH

Volatility persistence

0.7035
19.78***
γ

leverage

Additional response to negative shocks

-2.8365
-3.31***

Persistence:

0.836

Half-life:

4 days