V-Lab
Development Invt Constr Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Wednesday, September 9th, 2026
1 Day
8,751.68
increased by 1,822.12
1 Week
7,619.68
increased by 690.12
1 Month
7,787.63
increased by 858.07
Analysis last updated: Wednesday, September 9, 2026 at 08:55 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Aug 10, 2011 to Sep 4, 2026Model Insight
With persistence 0.997, illiquidity shocks have a half-life of 207 trading days (~0.8 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 0.997, shock half-life ~207 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.3539 | 3.27*** |
| αARCH | 0.1961 | 6.51*** |
| βGARCH | 0.8005 | 27.52*** |
Spline Coefficients
K=10
| γ1 | -3.4845 | -1.30 |
| γ2 | 7.0196 | 1.97** |
| γ3 | -6.0785 | -3.28*** |
| γ4 | 3.0524 | 1.75* |
| γ5 | 0.2365 | 0.13 |
| γ6 | -7.6242 | -3.22*** |
| γ7 | 16.8202 | 5.73*** |
| γ8 | -11.8934 | -4.75*** |
| γ9 | -1.5596 | -0.75 |
| γ10 | 8.4699 | 3.96*** |
0.997
Persistence207d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.3539 | 3.27*** |
α ARCH Response to squared shocks | 0.1961 | 6.51*** |
β GARCH Volatility persistence | 0.8005 | 27.52*** |
Spline Coefficients
K=10
| γ1 | -3.4845 | -1.30 |
| γ2 | 7.0196 | 1.97** |
| γ3 | -6.0785 | -3.28*** |
| γ4 | 3.0524 | 1.75* |
| γ5 | 0.2365 | 0.13 |
| γ6 | -7.6242 | -3.22*** |
| γ7 | 16.8202 | 5.73*** |
| γ8 | -11.8934 | -4.75*** |
| γ9 | -1.5596 | -0.75 |
| γ10 | 8.4699 | 3.96*** |
Persistence:
0.997
Half-life:
207 days
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