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V-Lab

Broadcom Inc APARCH Volatility Analysis

Volatility prediction for Wednesday, September 16th, 2026

1 Day

41.31%

decreased by 0.14%

1 Week

41.52%

increased by 0.07%

1 Month

42.25%

increased by 0.80%

Analysis last updated: Wednesday, September 16, 2026 at 02:21 AM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

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10Y ·

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graph of Broadcom Inc APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Aug 6, 2009 to Sep 11, 2026

Model Insight

Volatility shocks decay with a half-life of 29 trading days, meaning a shock loses half its impact after approximately 29 days. The volatility power δ = 1.24 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 29-day half-lifeδ = 1.24 · sub-quadratic power
ParamValuet-stat
ωconst0.0875
2.74***
αARCH0.0762
3.32***
βGARCH0.9135
35.03***
γleverage0.2747
1.83*
δpower1.2418
4.33***

0.977

Persistence

29d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0875
2.74***
α

ARCH

Response to squared shocks

0.0762
3.32***
β

GARCH

Volatility persistence

0.9135
35.03***
γ

leverage

Additional response to negative shocks

0.2747
1.83*
δ

power

Transformation power

1.2418
4.33***

Persistence:

0.977

Half-life:

29 days