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V-Lab

OMX Copenhagen 20 Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 19th, 2026

1 Day

15.29%

decreased by 0.79%

1 Week

15.41%

decreased by 0.67%

1 Month

15.84%

decreased by 0.24%

Analysis last updated: Wednesday, August 19, 2026 at 05:40 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of OMX Copenhagen 20 Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Aug 14, 2026

Model Insight

Volatility shocks decay with a half-life of 55 trading days, meaning a shock loses half its impact after approximately 55 days. Returns follow a Student-t distribution with v = 6.11 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

1.5135
7.12***
α

ARCH

Response to squared shocks

0.0728
31.83***
β

GARCH

Volatility persistence

0.9874
542.84***
ν

DF

Student-t tail thickness

6.1063
8.46***

Persistence:

0.987

Half-life:

55 days