V-Lab
Shenzhen Investment 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 Tuesday, September 8th, 2026
1 Day
5,896.27
increased by 71.07
1 Week
5,420.56
decreased by 404.64
1 Month
4,590.16
decreased by 1,235.04
Analysis last updated: Tuesday, September 8, 2026 at 08:20 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Mar 7, 1997 to Sep 4, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 9242 trading days (~36.7 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 ~9242 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.8686 | 4.33*** |
| αARCH | 0.1368 | 0.64 |
| βGARCH | 0.8632 | 4.03*** |
Spline Coefficients
K=6
| γ1 | -0.0858 | -0.19 |
| γ2 | 0.5357 | 0.91 |
| γ3 | -1.3878 | -7.11*** |
| γ4 | 1.8410 | 8.15*** |
| γ5 | -1.2585 | -4.31*** |
| γ6 | 0.4307 | 1.46 |
1.000
Persistence9242d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.8686 | 4.33*** |
α ARCH Response to squared shocks | 0.1368 | 0.64 |
β GARCH Volatility persistence | 0.8632 | 4.03*** |
Spline Coefficients
K=6
| γ1 | -0.0858 | -0.19 |
| γ2 | 0.5357 | 0.91 |
| γ3 | -1.3878 | -7.11*** |
| γ4 | 1.8410 | 8.15*** |
| γ5 | -1.2585 | -4.31*** |
| γ6 | 0.4307 | 1.46 |
Persistence:
1.000
Half-life:
9242 days
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