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V-Lab

Vulcan Infrastructure and Power Inc Asy. MEM Volatility Analysis

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

Volatility prediction for Wednesday, September 9th, 2026

1 Day

69.85%

increased by 0.97%

1 Week

72.89%

increased by 4.01%

1 Month

83.99%

increased by 15.11%

Analysis last updated: Tuesday, September 8, 2026 at 10:40 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Vulcan Infrastructure and Power Inc AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 15, 2021 to Sep 4, 2026

Model Insight

Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.

μ

AMEM Model

Tap to view equation

High persistence: persistence 1.000 ≥ 1, shocks do not decay
ParamValuet-stat
ωconst0.8634
3.10***
αARCH0.2762
5.24***
βGARCH0.7134
26.10***
γleverage0.0208
0.25

1.000

Persistence

-

Half-life
μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.8634
3.10***
α

ARCH

Response to squared shocks

0.2762
5.24***
β

GARCH

Volatility persistence

0.7134
26.10***
γ

leverage

Additional response to negative shocks

0.0208
0.25

Persistence:

1.000

Half-life:

-