Howmet Aerospace Inc Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, November 2nd, 2026
1 Day
33.23
increased by 2.89
1 Week
31.40
increased by 1.06
1 Month
28.74
decreased by 1.60
Analysis last updated: Friday, October 30, 2026 at 10:16 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Oct 30, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 1339 trading days (~5.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 160% more after negative returns
μ
ILLIQ-AMEM Model
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High persistence: persistence 0.999, shock half-life ~1339 daysAsymmetry: Illiquidity rises 160% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2157 | 1.83* |
| αARCH | 0.0320 | 6.32*** |
| βGARCH | 0.9418 | 254.60*** |
| γleverage | 0.0514 | 5.91*** |
0.999
Persistence1339d
Half-lifeμ
ILLIQ-AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2157 | 1.83* |
α ARCH Response to squared shocks | 0.0320 | 6.32*** |
β GARCH Volatility persistence | 0.9418 | 254.60*** |
γ leverage Additional response to negative shocks | 0.0514 | 5.91*** |
Persistence:
0.999
Half-life:
1339 days
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