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V-Lab

Conpet SA GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

15.40%

decreased by 0.36%

1 Week

16.84%

increased by 1.08%

1 Month

21.05%

increased by 5.29%

Analysis last updated: Tuesday, August 25, 2026 at 08:15 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Conpet SA GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 24, 2009 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1154
11.57***
α

ARCH

Response to squared shocks

0.1313
7.13***
β

GARCH

Volatility persistence

0.8383
129.39***
γ

leverage

Additional response to negative shocks

0.0152
0.52

Persistence:

0.977

Half-life:

30 days