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V-Lab

OMX Stockholm 30 Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, July 17th, 2026

1 Day

14.59%

decreased by 0.72%

1 Week

14.78%

decreased by 0.53%

1 Month

15.47%

increased by 0.16%

Analysis last updated: Thursday, July 16, 2026 at 04:06 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of OMX Stockholm 30 Index 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

Volatility shocks decay with a half-life of 63 trading days, meaning a shock loses half its impact after approximately 63 days. Returns follow a Student-t distribution with v = 8.81 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

1.8734
8.57***
α

ARCH

Response to squared shocks

0.0763
34.81***
β

GARCH

Volatility persistence

0.9891
759.08***
ν

DF

Student-t tail thickness

8.8136
5.41***

Persistence:

0.989

Half-life:

63 days