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V-Lab

QVC Group Inc APARCH Volatility Analysis

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

Volatility prediction for Monday, July 13th, 2026

1 Day

241.80%

increased by 2.51%

1 Week

241.92%

increased by 2.63%

1 Month

242.37%

increased by 3.08%

Analysis last updated: Saturday, July 11, 2026 at 09:27 AM UTC

Date Range:

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to

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graph of QVC Group Inc APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 5, 2006 to Jul 10, 2026
Boundary Parameters

Model Insight

With persistence 1.000, volatility shocks have a half-life of 46679 trading days (~185.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. The volatility power δ = 1.28 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

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0104
12.02***
α

ARCH

Response to squared shocks

0.0196
0.56
β

GARCH

Volatility persistence

0.9804
666.94***
γ

leverage

Additional response to negative shocks

1.0000
0.36
δ

power

Transformation power

1.2795
16.10***

Persistence:

1.000

Half-life:

46679 days