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V-Lab

Inventiva SA GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

85.87%

decreased by 8.80%

1 Week

86.82%

decreased by 7.85%

1 Month

89.31%

decreased by 5.36%

Analysis last updated: Saturday, August 22, 2026 at 08:37 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

All

graph of Inventiva SA GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 13, 2020 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 10 trading days, meaning a shock loses half its impact after approximately 10 days. Returns follow a Student-t distribution with v = 2.33 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

34.6247
2.15**
α

ARCH

Response to squared shocks

0.0956
10.21***
β

GARCH

Volatility persistence

0.9349
31.53***
ν

DF

Student-t tail thickness

2.3322
16.28***

Persistence:

0.935

Half-life:

10 days