V-Lab
Samhallsbygg I Nor GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
65.92%
decreased by 0.70%
1 Week
69.86%
increased by 3.24%
1 Month
80.36%
increased by 13.74%
Analysis last updated: Saturday, September 19, 2026 at 08:30 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 3, 2023 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 14 trading days, meaning a shock loses half its impact after approximately 14 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 14-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.9367 | 1.03 |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.8692 | 18.68*** |
| γleverage | 0.1661 | 1.78* |
0.952
Persistence14d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.9367 | 1.03 |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8692 | 18.68*** |
γ leverage Additional response to negative shocks | 0.1661 | 1.78* |
Persistence:
0.952
Half-life:
14 days
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