Howmet Aerospace Inc Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, October 12th, 2026
1 Day
27.42
decreased by 0.77
1 Week
27.29
decreased by 0.90
1 Month
26.53
decreased by 1.66
Analysis last updated: Saturday, October 10, 2026 at 01:47 AM 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 9, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 1249 trading days (~5.0 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 ~1249 daysAsymmetry: Illiquidity rises 160% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2233 | 1.87* |
| αARCH | 0.0321 | 6.30*** |
| βGARCH | 0.9416 | 254.15*** |
| γleverage | 0.0514 | 5.88*** |
0.999
Persistence1249d
Half-lifeμ
ILLIQ-AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2233 | 1.87* |
α ARCH Response to squared shocks | 0.0321 | 6.30*** |
β GARCH Volatility persistence | 0.9416 | 254.15*** |
γ leverage Additional response to negative shocks | 0.0514 | 5.88*** |
Persistence:
0.999
Half-life:
1249 days
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