V-Lab
Howmet Aerospace Inc Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
25.98
decreased by 0.83
1 Week
27.09
increased by 0.28
1 Month
29.24
increased by 2.43
Analysis last updated: Friday, September 18, 2026 at 11:31 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 1201 trading days (~4.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 161% more after negative returns
μ
ILLIQ-AMEM Model
Tap to view equation
High persistence: persistence 0.999, shock half-life ~1201 daysAsymmetry: Illiquidity rises 161% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2282 | 1.89* |
| αARCH | 0.0320 | 6.27*** |
| βGARCH | 0.9416 | 253.80*** |
| γleverage | 0.0516 | 5.91*** |
0.999
Persistence1201d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2282 | 1.89* |
α ARCH Response to squared shocks | 0.0320 | 6.27*** |
β GARCH Volatility persistence | 0.9416 | 253.80*** |
γ leverage Additional response to negative shocks | 0.0516 | 5.91*** |
Persistence:
0.999
Half-life:
1201 days
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