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V-Lab

Siemens AG GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, July 14th, 2026

1 Day

34.26%

decreased by 1.43%

1 Week

34.25%

decreased by 1.44%

1 Month

34.19%

decreased by 1.50%

Analysis last updated: Tuesday, July 14, 2026 at 06:39 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

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10Y ·

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graph of Siemens 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 Jul 10, 2026

Model Insight

With persistence 0.997, volatility shocks have a half-life of 211 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 6.06 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

4.0690
5.04***
α

ARCH

Response to squared shocks

0.0533
62.45***
β

GARCH

Volatility persistence

0.9967
1,610.22***
ν

DF

Student-t tail thickness

6.0627
13.28***

Persistence:

0.997

Half-life:

211 days