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V-Lab

Inmocemento S A APARCH Volatility Analysis

Volatility prediction for Tuesday, September 8th, 2026

1 Day

23.06%

decreased by 1.50%

1 Week

25.66%

increased by 1.10%

1 Month

28.80%

increased by 4.24%

Analysis last updated: Tuesday, September 8, 2026 at 09:49 PM UTC

Date Range:

from

to

6M ·

1Y ·

All

graph of Inmocemento S A APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 12, 2024 to Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days. The volatility power δ = 1.25 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

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Shock decay: Shocks decay with a 3-day half-lifeδ = 1.25 · sub-quadratic power
ParamValuet-stat
ωconst0.4808
1.00
αARCH0.1708
2.48**
βGARCH0.6455
3.69***
γleverage0.1074
0.47
δpower1.2492
1.34

0.786

Persistence

3d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.4808
1.00
α

ARCH

Response to squared shocks

0.1708
2.48**
β

GARCH

Volatility persistence

0.6455
3.69***
γ

leverage

Additional response to negative shocks

0.1074
0.47
δ

power

Transformation power

1.2492
1.34

Persistence:

0.786

Half-life:

3 days