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V-Lab

Apple Inc Asy. MEM Volatility Analysis

Volatility prediction for Friday, September 4th, 2026

1 Day

28.13%

decreased by 0.94%

1 Week

28.72%

decreased by 0.35%

1 Month

30.85%

increased by 1.78%

Analysis last updated: Thursday, September 3, 2026 at 09:20 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

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10Y ·

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graph of Apple Inc AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 28, 2026

Model Insight

With persistence 0.992, volatility shocks have a half-life of 81 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 36% more than positive returns

μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0938
6.16***
α

ARCH

Response to squared shocks

0.1605
11.40***
β

GARCH

Volatility persistence

0.8024
73.36***
γ

leverage

Additional response to negative shocks

0.0573
2.13**

Persistence:

0.992

Half-life:

81 days