V-Lab
Montanaro UK Smaller Companies Investment Trust PLC 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 Monday, October 5th, 2026
1 Day
81,551.96
decreased by 6,595.06
1 Week
88,576.93
increased by 429.91
1 Month
104,246.21
increased by 16,099.19
Analysis last updated: Sunday, October 4, 2026 at 12:20 AM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 2007 to Oct 2, 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
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High persistence: persistence 1.000, shock half-life ~231049 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.9974 | |
| αARCH | 0.1166 | |
| βGARCH | 0.8834 |
Spline Coefficients
K=10
| γ1 | 0.6917 | |
| γ2 | -0.4871 | |
| γ3 | -3.9349 | |
| γ4 | 9.6622 | |
| γ5 | -10.9768 | |
| γ6 | 8.0752 | |
| γ7 | -4.4210 | |
| γ8 | 1.8515 | |
| γ9 | -0.6785 | |
| γ10 | 0.8111 |
1.000
Persistence231049d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9974 | |
α ARCH Response to squared shocks | 0.1166 | |
β GARCH Volatility persistence | 0.8834 |
Spline Coefficients
K=10
| γ1 | 0.6917 | |
| γ2 | -0.4871 | |
| γ3 | -3.9349 | |
| γ4 | 9.6622 | |
| γ5 | -10.9768 | |
| γ6 | 8.0752 | |
| γ7 | -4.4210 | |
| γ8 | 1.8515 | |
| γ9 | -0.6785 | |
| γ10 | 0.8111 |
Persistence:
1.000
Half-life:
231049 days
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