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V-Lab

Sonda S.A. GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

20.23%

decreased by 0.54%

1 Week

20.73%

decreased by 0.04%

1 Month

22.27%

increased by 1.50%

Analysis last updated: Tuesday, August 25, 2026 at 06:00 PM UTC

Date Range:

from

to

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 Aug 21, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 202% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0939
15.89***
α

ARCH

Response to squared shocks

0.0397
13.39***
β

GARCH

Volatility persistence

0.8881
249.05***
γ

leverage

Additional response to negative shocks

0.0802
7.63***

Persistence:

0.968

Half-life:

21 days