V-Lab
Samhallsbygg I Nor EGARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
52.55%
increased by 0.69%
1 Week
53.29%
increased by 1.43%
1 Month
56.24%
increased by 4.38%
Analysis last updated: Tuesday, September 8, 2026 at 08:04 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 3, 2023 to Sep 4, 2026Model Insight
With persistence 0.991, volatility shocks have a half-life of 78 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
EGARCH Model
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High persistence: persistence 0.991, shock half-life ~78 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0351 | 0.40 |
| αARCH | 0.0741 | 1.71* |
| βGARCH | 0.9912 | 59.96*** |
| γleverage | -0.0995 | -1.95* |
0.991
Persistence78d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0351 | 0.40 |
α ARCH Response to squared shocks | 0.0741 | 1.71* |
β GARCH Volatility persistence | 0.9912 | 59.96*** |
γ leverage Additional response to negative shocks | -0.0995 | -1.95* |
Persistence:
0.991
Half-life:
78 days
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