V-Lab
Guangzhou Development Group Inc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Thursday, September 24th, 2026
1 Day
63.33
increased by 2.56
1 Week
68.12
increased by 7.35
1 Month
67.84
increased by 7.07
Analysis last updated: Thursday, September 24, 2026 at 06:03 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jul 18, 1997 to Sep 18, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 691 trading days (~2.7 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 0.999, shock half-life ~691 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6181 | 4.28*** |
| αARCH | 0.2355 | 19.96*** |
| βGARCH | 0.7635 | 64.71*** |
Spline Coefficients
K=10
| γ1 | 0.1773 | 0.86 |
| γ2 | -0.7207 | -2.32** |
| γ3 | 2.0738 | 8.57*** |
| γ4 | -2.8287 | -8.42*** |
| γ5 | 1.8175 | 4.28*** |
| γ6 | -2.2636 | -5.21*** |
| γ7 | 4.3685 | 9.26*** |
| γ8 | -3.9276 | -10.40*** |
| γ9 | 1.5117 | 6.23*** |
| γ10 | -0.3259 | -1.14 |
0.999
Persistence691d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6181 | 4.28*** |
α ARCH Response to squared shocks | 0.2355 | 19.96*** |
β GARCH Volatility persistence | 0.7635 | 64.71*** |
Spline Coefficients
K=10
| γ1 | 0.1773 | 0.86 |
| γ2 | -0.7207 | -2.32** |
| γ3 | 2.0738 | 8.57*** |
| γ4 | -2.8287 | -8.42*** |
| γ5 | 1.8175 | 4.28*** |
| γ6 | -2.2636 | -5.21*** |
| γ7 | 4.3685 | 9.26*** |
| γ8 | -3.9276 | -10.40*** |
| γ9 | 1.5117 | 6.23*** |
| γ10 | -0.3259 | -1.14 |
Persistence:
0.999
Half-life:
691 days
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