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V-Lab

HeidelbergCement AG GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

24.66%

decreased by 1.49%

1 Week

25.05%

decreased by 1.10%

1 Month

26.47%

increased by 0.32%

Analysis last updated: Saturday, August 22, 2026 at 08:35 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of HeidelbergCement AG GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 66 trading days, meaning a shock loses half its impact after approximately 66 days. Returns follow a Student-t distribution with v = 4.49 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

6.1564
4.13***
α

ARCH

Response to squared shocks

0.0810
38.21***
β

GARCH

Volatility persistence

0.9895
377.53***
ν

DF

Student-t tail thickness

4.4875
14.03***

Persistence:

0.989

Half-life:

66 days