V-Lab
Cherat Papersack Ltd 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 Monday, September 28th, 2026
1 Day
14,805.43
increased by 8,797.39
1 Week
6,272.86
increased by 264.82
1 Month
2,846.70
decreased by 3,161.34
Analysis last updated: Saturday, September 26, 2026 at 10:13 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Sep 10, 2001 to Sep 25, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 23901 trading days (~94.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
Tap to view equation
High persistence: persistence 1.000, shock half-life ~23901 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.9481 | 1.02 |
| αARCH | 0.2300 | 0.04 |
| βGARCH | 0.7699 | 0.15 |
Spline Coefficients
K=10
| γ1 | -0.1899 | 0.00 |
| γ2 | 1.1579 | 0.01 |
| γ3 | -1.2746 | -0.01 |
| γ4 | -6.0548 | -0.05 |
| γ5 | 17.3320 | 0.06 |
| γ6 | -16.0012 | -0.06 |
| γ7 | 4.7781 | 0.05 |
| γ8 | 0.9479 | 0.17 |
| γ9 | -1.6669 | -1.56 |
| γ10 | 1.3943 | 0.29 |
1.000
Persistence23901d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9481 | 1.02 |
α ARCH Response to squared shocks | 0.2300 | 0.04 |
β GARCH Volatility persistence | 0.7699 | 0.15 |
Spline Coefficients
K=10
| γ1 | -0.1899 | 0.00 |
| γ2 | 1.1579 | 0.01 |
| γ3 | -1.2746 | -0.01 |
| γ4 | -6.0548 | -0.05 |
| γ5 | 17.3320 | 0.06 |
| γ6 | -16.0012 | -0.06 |
| γ7 | 4.7781 | 0.05 |
| γ8 | 0.9479 | 0.17 |
| γ9 | -1.6669 | -1.56 |
| γ10 | 1.3943 | 0.29 |
Persistence:
1.000
Half-life:
23901 days
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