Skip to main content
V-Lab
V-Lab

VIEL & Cie SA GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, October 29th, 2026

1 Day

28.75%

decreased by 3.78%

1 Week

29.64%

decreased by 2.89%

1 Month

31.91%

decreased by 0.62%

Analysis last updated: Thursday, October 29, 2026 at 09:35 PM UTC

Press Delete or Backspace to remove this series.
Date Range:

from

10/28/2024

to

10/28/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of VIEL & Cie SA GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Oct 23, 2026

Model Insight

Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days. Returns follow a Student-t distribution with v = 4.71 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 11-day half-lifev = 4.71 · fat tails
ParamValuet-stat
ωlong-run5.1491
3.81***
αscore0.1498
8.34***
βpersistence0.9361
55.54***
νDF4.7064
3.27***

0.936

Persistence

11d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

5.1491
3.81***
α

score

Weight on the scaled score

0.1498
8.34***
β

persistence

Volatility persistence

0.9361
55.54***
ν

DF

Student-t tail thickness

4.7064
3.27***

Persistence:

0.936

Half-life:

11 days