V-Lab
Amtech Systems Inc Asymmetric ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Wednesday, September 9th, 2026
1 Day
5,934.38
1 Week
5,511.17
1 Month
6,336.59
Analysis last updated: Tuesday, September 8, 2026 at 10:25 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 1, 1990 to Sep 4, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 1386294 trading days (~5501.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
ILLIQ-AMEM Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 0.10 |
| αARCH | 0.0625 | 3.97*** |
| βGARCH | 0.9238 | 84.78*** |
| γleverage | 0.0274 | 0.89 |
1.000
Persistence1386294d
Half-lifeILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.10 |
α ARCH Response to squared shocks | 0.0625 | 3.97*** |
β GARCH Volatility persistence | 0.9238 | 84.78*** |
γ leverage Additional response to negative shocks | 0.0274 | 0.89 |
Persistence:
1.000
Half-life:
1386294 days
Other Amtech Systems Inc Analyses
Other Asymmetric ILLIQ Analyses on Equities