V-Lab
Sivers Semiconductors Ab GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
131.71%
decreased by 4.39%
1 Week
129.93%
decreased by 6.17%
1 Month
123.63%
decreased by 12.47%
Analysis last updated: Friday, September 11, 2026 at 09:19 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 17, 2014 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 30-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6310 | 2.86*** |
| αARCH | 0.0812 | 3.02*** |
| βGARCH | 0.8932 | 41.94*** |
| γleverage | 0.0055 | 0.09 |
0.977
Persistence30d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6310 | 2.86*** |
α ARCH Response to squared shocks | 0.0812 | 3.02*** |
β GARCH Volatility persistence | 0.8932 | 41.94*** |
γ leverage Additional response to negative shocks | 0.0055 | 0.09 |
Persistence:
0.977
Half-life:
30 days
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