V-Lab
JPMorgan UK Small CAP Growth & Income PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, October 5th, 2026
1 Day
12,515.51
increased by 983.13
1 Week
13,535.68
increased by 2,003.30
1 Month
18,144.49
increased by 6,612.11
Analysis last updated: Saturday, October 3, 2026 at 11:34 PM 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 0.999, illiquidity shocks have a half-life of 614 trading days (~2.4 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 0.999, shock half-life ~614 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1901 | 3.79*** |
| αARCH | 0.1991 | 6.93*** |
| βGARCH | 0.7997 | 28.04*** |
Spline Coefficients
K=8
| γ1 | -0.8732 | -1.88* |
| γ2 | 1.3683 | 1.79* |
| γ3 | -3.8313 | -2.72*** |
| γ4 | 9.0227 | 3.32*** |
| γ5 | -8.9533 | -3.63*** |
| γ6 | 4.0583 | 4.27*** |
| γ7 | -1.3616 | -4.41*** |
| γ8 | 1.2414 | 3.60*** |
0.999
Persistence614d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1901 | 3.79*** |
α ARCH Response to squared shocks | 0.1991 | 6.93*** |
β GARCH Volatility persistence | 0.7997 | 28.04*** |
Spline Coefficients
K=8
| γ1 | -0.8732 | -1.88* |
| γ2 | 1.3683 | 1.79* |
| γ3 | -3.8313 | -2.72*** |
| γ4 | 9.0227 | 3.32*** |
| γ5 | -8.9533 | -3.63*** |
| γ6 | 4.0583 | 4.27*** |
| γ7 | -1.3616 | -4.41*** |
| γ8 | 1.2414 | 3.60*** |
Persistence:
0.999
Half-life:
614 days
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