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OMX Stockholm 30 Index GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 28th, 2026

1 Day

15.87%

decreased by 0.49%

1 Week

16.10%

decreased by 0.26%

1 Month

16.93%

increased by 0.57%

Analysis last updated: Friday, September 25, 2026 at 04:09 PM UTC

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graph of OMX Stockholm 30 Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 25, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

GJR-GARCH Model

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Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
ωconst0.0299
5.48***
αARCH0.0233
2.47**
βGARCH0.9009
121.55***
γleverage0.1220
5.88***

0.985

Persistence

47d

Half-life
σ

GJR-GARCH Model

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ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0299
5.48***
α

ARCH

Response to squared shocks

0.0233
2.47**
β

GARCH

Volatility persistence

0.9009
121.55***
γ

leverage

Additional response to negative shocks

0.1220
5.88***

Persistence:

0.985

Half-life:

47 days