V-Lab
Arch Meter Corporation Spline ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Thursday, October 1st, 2026
1 Day
4,271.90
increased by 1,020.24
1 Week
3,452.99
increased by 201.33
1 Month
5,197.30
increased by 1,945.64
Analysis last updated: Thursday, October 1, 2026 at 10:02 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Nov 4, 2022 to Sep 24, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 99021 trading days (~392.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
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High persistence: persistence 1.000, shock half-life ~99021 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.9377 | 0.57 |
| αARCH | 0.2908 | 0.04 |
| βGARCH | 0.7092 | 0.09 |
Spline Coefficients
K=1
| γ1 | -0.9281 | -0.02 |
1.000
Persistence99021d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9377 | 0.57 |
α ARCH Response to squared shocks | 0.2908 | 0.04 |
β GARCH Volatility persistence | 0.7092 | 0.09 |
Spline Coefficients
K=1
| γ1 | -0.9281 | -0.02 |
Persistence:
1.000
Half-life:
99021 days
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