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V-Lab

CAC 40 Index GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

12.29%

decreased by 0.24%

1 Week

12.72%

increased by 0.19%

1 Month

14.12%

increased by 1.59%

Analysis last updated: Tuesday, August 25, 2026 at 04:03 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CAC 40 Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 21, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0352
16.09***
α

ARCH

Response to squared shocks

0.0115
5.24***
β

GARCH

Volatility persistence

0.8996
441.87***
γ

leverage

Additional response to negative shocks

0.1336
28.16***

Persistence:

0.978

Half-life:

31 days