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V-Lab

Ibovespa Brasil Sao Paulo Stock Exchange Index Asy. MEM Volatility Analysis

Volatility prediction for Monday, August 10th, 2026

1 Day

20.29%

increased by 2.70%

1 Week

20.77%

increased by 3.18%

1 Month

22.43%

increased by 4.84%

Analysis last updated: Friday, August 7, 2026 at 09:02 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Ibovespa Brasil Sao Paulo Stock Exchange Index AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 27, 1993 to Aug 7, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 68% more than equivalent positive returns.

μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0625
26.14***
α

ARCH

Response to squared shocks

0.1450
37.42***
β

GARCH

Volatility persistence

0.7914
275.64***
γ

leverage

Additional response to negative shocks

0.0993
14.79***

Persistence:

0.986

Half-life:

49 days