V-Lab
Howmet Aerospace Inc MEM Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
39.37%
decreased by 1.26%
1 Week
39.27%
decreased by 1.36%
1 Month
38.92%
decreased by 1.71%
Analysis last updated: Monday, September 14, 2026 at 09:49 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 27 trading days, meaning a shock loses half its impact after approximately 27 days.
μ
MEM Model
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Shock decay: Shocks decay with a 27-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1399 | 2.63*** |
| αARCH | 0.1568 | 10.74*** |
| βGARCH | 0.8178 | 74.63*** |
0.975
Persistence27d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1399 | 2.63*** |
α ARCH Response to squared shocks | 0.1568 | 10.74*** |
β GARCH Volatility persistence | 0.8178 | 74.63*** |
Persistence:
0.975
Half-life:
27 days
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