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Sonda S.A. GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, October 7th, 2026

1 Day

22.62%

decreased by 0.70%

1 Week

22.93%

decreased by 0.39%

1 Month

23.90%

increased by 0.58%

Analysis last updated: Wednesday, October 7, 2026 at 06:13 PM UTC

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Date Range:

from

10/06/2024

to

10/06/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Sonda S.A. GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 9, 2006 to Oct 2, 2026

Model Insight

Volatility shocks decay with a half-life of 21 trading days, meaning a shock loses half its impact after approximately 21 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 21-day half-life
ParamValuet-stat
ωconst0.0944
3.99***
αARCH0.0399
3.36***
βGARCH0.8882
62.25***
γleverage0.0793
1.89*

0.968

Persistence

21d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0944
3.99***
α

ARCH

Response to squared shocks

0.0399
3.36***
β

GARCH

Volatility persistence

0.8882
62.25***
γ

leverage

Additional response to negative shocks

0.0793
1.89*

Persistence:

0.968

Half-life:

21 days