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V-Lab

Samhallsbygg I Nor Asy. Power MEM Volatility Analysis

High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful

Volatility prediction for Friday, September 4th, 2026

1 Day

52.35%

decreased by 1.35%

1 Week

57.32%

increased by 3.62%

1 Month

74.09%

increased by 20.39%

Analysis last updated: Friday, September 4, 2026 at 06:42 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Samhallsbygg I Nor APMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 3, 2023 to Aug 20, 2026

Model Insight

With persistence 1.000, volatility shocks have a half-life of 2050913 trading days (~8138.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 381% more than positive returns

μ

APMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0000
1.33
α

ARCH

Response to squared shocks

0.1309
2.45**
β

GARCH

Volatility persistence

0.8537
16.11***
γ

leverage

Additional response to negative shocks

0.3814
2.95***
δ

power

Transformation power

1.9552
3.76***

Persistence:

1.000

Half-life:

2050913 days