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V-Lab
V-Lab

HP Inc AGARCH Volatility Analysis

Volatility prediction for Tuesday, September 22nd, 2026

1 Day

49.73%

decreased by 0.66%

1 Week

49.49%

decreased by 0.90%

1 Month

48.60%

decreased by 1.79%

Analysis last updated: Monday, September 21, 2026 at 09:44 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of HP Inc AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

The news-impact curve is shifted (γ = 0.73) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.

σ

AGARCH Model

Tap to view equation

Asymmetry: negative returns raise volatility more
ParamValuet-stat
ωconst0.0573
2.71***
αARCH0.0338
5.30***
βGARCH0.9537
113.58***
γleverage0.7254
2.10**

0.988

Persistence

55d

Half-life
σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0573
2.71***
α

ARCH

Response to squared shocks

0.0338
5.30***
β

GARCH

Volatility persistence

0.9537
113.58***
γ

leverage

Additional response to negative shocks

0.7254
2.10**

Persistence:

0.988

Half-life:

55 days