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V-Lab
V-Lab

News Corp APARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

24.87%

increased by 0.66%

1 Week

25.69%

increased by 1.48%

1 Month

27.22%

increased by 3.01%

Analysis last updated: Friday, September 18, 2026 at 10:42 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of News Corp APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jun 19, 2013 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days. The volatility power δ = 1.77 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

Tap to view equation

Shock decay: Shocks decay with a 5-day half-lifeδ = 1.77 · sub-quadratic power
ParamValuet-stat
ωconst0.3467
1.36
αARCH0.1388
3.61***
βGARCH0.7467
10.80***
γleverage0.1377
1.90*
δpower1.7684
2.75***

0.877

Persistence

5d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.3467
1.36
α

ARCH

Response to squared shocks

0.1388
3.61***
β

GARCH

Volatility persistence

0.7467
10.80***
γ

leverage

Additional response to negative shocks

0.1377
1.90*
δ

power

Transformation power

1.7684
2.75***

Persistence:

0.877

Half-life:

5 days