V-Lab
ACI Formulations PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 8th, 2026
1 Day
984.17
decreased by 186.79
1 Week
895.28
decreased by 275.68
1 Month
535.90
decreased by 635.06
Analysis last updated: Tuesday, September 8, 2026 at 07:20 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Feb 10, 2009 to Sep 3, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 1423 trading days (~5.6 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 ~1423 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0623 | 6.73*** |
| αARCH | 0.3130 | 12.63*** |
| βGARCH | 0.6865 | 27.70*** |
Spline Coefficients
K=6
| γ1 | -0.5753 | -1.18 |
| γ2 | 0.1894 | 0.30 |
| γ3 | 1.2540 | 4.84*** |
| γ4 | -2.1733 | -7.11*** |
| γ5 | 2.7586 | 4.01*** |
| γ6 | -2.7610 | -1.90* |
1.000
Persistence1423d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0623 | 6.73*** |
α ARCH Response to squared shocks | 0.3130 | 12.63*** |
β GARCH Volatility persistence | 0.6865 | 27.70*** |
Spline Coefficients
K=6
| γ1 | -0.5753 | -1.18 |
| γ2 | 0.1894 | 0.30 |
| γ3 | 1.2540 | 4.84*** |
| γ4 | -2.1733 | -7.11*** |
| γ5 | 2.7586 | 4.01*** |
| γ6 | -2.7610 | -1.90* |
Persistence:
1.000
Half-life:
1423 days
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