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
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 28, 2026Model 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
| Parameter | Value | t-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
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