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V-Lab

CBOE Brazil ETF Volatility Index AGARCH Volatility Analysis

Volatility prediction for Friday, August 7th, 2026

1 Day

59.53%

decreased by 1.91%

1 Week

65.82%

increased by 4.38%

1 Month

76.20%

increased by 14.76%

Analysis last updated: Friday, August 7, 2026 at 08:40 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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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 Apr 4, 2025

Model Insight

The news-impact curve is shifted (γ = -2.69) 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

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.6242
17.24***
α

ARCH

Response to squared shocks

0.1338
19.15***
β

GARCH

Volatility persistence

0.7370
98.31***
γ

leverage

Additional response to negative shocks

-2.6947
-12.91***

Persistence:

0.871

Half-life:

5 days