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VIEL & Cie SA GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 5th, 2026

1 Day

36.54%

increased by 6.34%

1 Week

36.58%

increased by 6.38%

1 Month

36.68%

increased by 6.48%

Analysis last updated: Wednesday, August 5, 2026 at 06:37 PM UTC

Date Range:

from

to

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 Jul 31, 2026

Model Insight

Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days. Returns follow a Student-t distribution with v = 3.12 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.3674
10.27***
α

ARCH

Response to squared shocks

0.1568
27.62***
β

GARCH

Volatility persistence

0.9047
100.16***
ν

DF

Student-t tail thickness

3.1157
21.64***

Persistence:

0.905

Half-life:

7 days