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V-Lab

Ventia Services Group Pty Ltd APARCH Volatility Analysis

Volatility prediction for Wednesday, August 19th, 2026

1 Day

30.86%

unchanged at 0.00%

1 Week

30.86%

unchanged at 0.00%

1 Month

30.86%

unchanged at 0.00%

Analysis last updated: Wednesday, August 19, 2026 at 07:52 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Ventia Services Group Pty Ltd APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 23, 2021 to Aug 14, 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 = 2.54 sits above 2, so large shocks influence volatility more than quadratically, dominating the response more than in standard GARCH.

σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0000
1.75*
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8158
16.39***
γ

leverage

Additional response to negative shocks

0.0641
0.00
δ

power

Transformation power

2.5444
4.21***

Persistence:

0.816

Half-life:

3 days