V-Lab
Dogusan Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
15,440.68
increased by 11,272.41
1 Week
4,941.23
increased by 772.96
1 Month
2,458.85
decreased by 1,709.42
Analysis last updated: Sunday, September 20, 2026 at 03:17 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Mar 28, 1995 to Sep 18, 2026Model Insight
With persistence 0.995, illiquidity shocks have a half-life of 137 trading days (~0.5 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 0.995, shock half-life ~137 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.8644 | 3.71*** |
| αARCH | 0.2475 | 16.98*** |
| βGARCH | 0.7474 | 55.17*** |
Spline Coefficients
K=10
| γ1 | -1.1201 | -5.02*** |
| γ2 | 1.5594 | 5.82*** |
| γ3 | -0.6943 | -4.13*** |
| γ4 | 0.5988 | 3.67*** |
| γ5 | -0.4443 | -3.64*** |
| γ6 | 0.2295 | 2.47** |
| γ7 | -0.3549 | -3.62*** |
| γ8 | 0.3326 | 2.49** |
| γ9 | -0.1473 | -0.99 |
| γ10 | 0.2459 | 1.38 |
0.995
Persistence137d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.8644 | 3.71*** |
α ARCH Response to squared shocks | 0.2475 | 16.98*** |
β GARCH Volatility persistence | 0.7474 | 55.17*** |
Spline Coefficients
K=10
| γ1 | -1.1201 | -5.02*** |
| γ2 | 1.5594 | 5.82*** |
| γ3 | -0.6943 | -4.13*** |
| γ4 | 0.5988 | 3.67*** |
| γ5 | -0.4443 | -3.64*** |
| γ6 | 0.2295 | 2.47** |
| γ7 | -0.3549 | -3.62*** |
| γ8 | 0.3326 | 2.49** |
| γ9 | -0.1473 | -0.99 |
| γ10 | 0.2459 | 1.38 |
Persistence:
0.995
Half-life:
137 days
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