V-Lab
OMX Copenhagen 20 Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
15.83%
decreased by 0.59%
1 Week
16.07%
decreased by 0.35%
1 Month
16.82%
increased by 0.40%
Analysis last updated: Saturday, September 19, 2026 at 05:47 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 18, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 135% more than equivalent positive returns.
σ
GJR-GARCH Model
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Leverage: Negative returns increase volatility 135% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0448 | 4.66*** |
| αARCH | 0.0573 | 3.78*** |
| βGARCH | 0.8746 | 78.05*** |
| γleverage | 0.0771 | 2.38** |
0.970
Persistence23d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0448 | 4.66*** |
α ARCH Response to squared shocks | 0.0573 | 3.78*** |
β GARCH Volatility persistence | 0.8746 | 78.05*** |
γ leverage Additional response to negative shocks | 0.0771 | 2.38** |
Persistence:
0.970
Half-life:
23 days
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