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Samhallsbygg I Nor GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

68.71%

decreased by 4.86%

1 Week

71.01%

decreased by 2.56%

1 Month

78.54%

increased by 4.97%

Analysis last updated: Saturday, September 19, 2026 at 08:31 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Samhallsbygg I Nor GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 3, 2023 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 34 trading days, meaning a shock loses half its impact after approximately 34 days. Returns follow a Student-t distribution with v = 2.73 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 34-day half-lifev = 2.73 · fat tails
ParamValuet-stat
ωconst51.2892
0.73
αARCH0.0779
7.08***
βGARCH0.9800
42.83***
νDF2.7298
4.95***

0.980

Persistence

34d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

51.2892
0.73
α

ARCH

Response to squared shocks

0.0779
7.08***
β

GARCH

Volatility persistence

0.9800
42.83***
ν

DF

Student-t tail thickness

2.7298
4.95***

Persistence:

0.980

Half-life:

34 days