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V-Lab

VIEL & Cie SA GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

27.66%

increased by 3.39%

1 Week

29.24%

increased by 4.97%

1 Month

32.07%

increased by 7.80%

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of VIEL & Cie SA GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Aug 21, 2026

Model Insight

This asset exhibits a modest leverage effect: negative returns increase next-day volatility 22% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.5787
27.16***
α

ARCH

Response to squared shocks

0.1874
21.09***
β

GARCH

Volatility persistence

0.6684
88.18***
γ

leverage

Additional response to negative shocks

0.0408
2.51**

Persistence:

0.876

Half-life:

5 days