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V-Lab

Plc Spa GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

42.39%

increased by 0.05%

1 Week

51.00%

increased by 8.66%

1 Month

67.37%

increased by 25.03%

Analysis last updated: Saturday, August 22, 2026 at 11:22 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Plc Spa GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 20, 2006 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days. Returns follow a Student-t distribution with v = 2.21 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

28.1891
5.31***
α

ARCH

Response to squared shocks

0.1304
25.13***
β

GARCH

Volatility persistence

0.9177
57.31***
ν

DF

Student-t tail thickness

2.2083
72.47***

Persistence:

0.918

Half-life:

8 days