V-Lab
Vinacomin Halam Coal Jsc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Friday, September 11th, 2026
1 Day
14,178.10
decreased by 1,679.89
1 Week
15,175.13
decreased by 682.86
1 Month
11,199.54
decreased by 4,658.45
Analysis last updated: Friday, September 11, 2026 at 09:34 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Mar 5, 2009 to Sep 4, 2026Model Insight
With persistence 0.996, illiquidity shocks have a half-life of 159 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
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High persistence: persistence 0.996, shock half-life ~159 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2372 | 3.97*** |
| αARCH | 0.1137 | 7.54*** |
| βGARCH | 0.8820 | 49.20*** |
Spline Coefficients
K=8
| γ1 | 1.1329 | 0.95 |
| γ2 | -2.2251 | -1.42 |
| γ3 | 1.8712 | 2.14** |
| γ4 | -1.2182 | -1.31 |
| γ5 | -1.0829 | -0.98 |
| γ6 | 4.1664 | 3.53*** |
| γ7 | -4.6357 | -4.14*** |
| γ8 | 5.0148 | 2.74*** |
0.996
Persistence159d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2372 | 3.97*** |
α ARCH Response to squared shocks | 0.1137 | 7.54*** |
β GARCH Volatility persistence | 0.8820 | 49.20*** |
Spline Coefficients
K=8
| γ1 | 1.1329 | 0.95 |
| γ2 | -2.2251 | -1.42 |
| γ3 | 1.8712 | 2.14** |
| γ4 | -1.2182 | -1.31 |
| γ5 | -1.0829 | -0.98 |
| γ6 | 4.1664 | 3.53*** |
| γ7 | -4.6357 | -4.14*** |
| γ8 | 5.0148 | 2.74*** |
Persistence:
0.996
Half-life:
159 days
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