V-Lab
Carlos Casado Sa 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 Wednesday, September 16th, 2026
1 Day
9,199.09
increased by 1,038.88
1 Week
8,767.24
increased by 607.03
1 Month
11,041.81
increased by 2,881.60
Analysis last updated: Thursday, September 17, 2026 at 04:46 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jul 29, 1994 to Sep 14, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 231049 trading days (~916.9 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 ~231049 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 83.3027 | |
| αARCH | 0.0883 | |
| βGARCH | 0.9117 |
Spline Coefficients
K=6
| γ1 | 0.2455 | |
| γ2 | -0.4366 | |
| γ3 | 0.2201 | |
| γ4 | 0.2374 | |
| γ5 | -1.1047 | |
| γ6 | 2.3403 |
1.000
Persistence231049d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 83.3027 | |
α ARCH Response to squared shocks | 0.0883 | |
β GARCH Volatility persistence | 0.9117 |
Spline Coefficients
K=6
| γ1 | 0.2455 | |
| γ2 | -0.4366 | |
| γ3 | 0.2201 | |
| γ4 | 0.2374 | |
| γ5 | -1.1047 | |
| γ6 | 2.3403 |
Persistence:
1.000
Half-life:
231049 days
Other Carlos Casado Sa Analyses
Other Spline ILLIQ Analyses on International Equities