V-Lab
OMX Stockholm 30 Index AGARCH Volatility Analysis
Volatility prediction for Monday, September 28th, 2026
1 Day
15.89%
decreased by 0.88%
1 Week
16.19%
decreased by 0.58%
1 Month
17.19%
increased by 0.42%
Analysis last updated: Friday, September 25, 2026 at 04:10 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 25, 2026Model Insight
The news-impact curve is shifted (γ = 0.65) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.
σ
AGARCH Model
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Asymmetry: negative returns raise volatility more
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0070 | 0.91 |
| αARCH | 0.0848 | 11.15*** |
| βGARCH | 0.8922 | 110.27*** |
| γleverage | 0.6475 | 7.62*** |
0.977
Persistence30d
Half-lifeσ
AGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0070 | 0.91 |
α ARCH Response to squared shocks | 0.0848 | 11.15*** |
β GARCH Volatility persistence | 0.8922 | 110.27*** |
γ leverage Additional response to negative shocks | 0.6475 | 7.62*** |
Persistence:
0.977
Half-life:
30 days
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