JPMorgan UK Small CAP Growth & Income PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, October 26th, 2026
1 Day
24,696.24
decreased by 2,084.08
1 Week
22,600.64
decreased by 4,179.68
1 Month
19,289.25
decreased by 7,491.07
Analysis last updated: Sunday, October 25, 2026 at 08:37 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 23, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 577 trading days (~2.3 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 ~577 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2016 | 3.87*** |
| αARCH | 0.1994 | 6.93*** |
| βGARCH | 0.7994 | 28.04*** |
Spline Coefficients
K=8
| γ1 | -0.8420 | -1.83* |
| γ2 | 1.3180 | 1.74* |
| γ3 | -3.8208 | -2.67*** |
| γ4 | 9.0825 | 3.25*** |
| γ5 | -9.0545 | -3.55*** |
| γ6 | 4.1453 | 4.19*** |
| γ7 | -1.4433 | -4.43*** |
| γ8 | 1.3944 | 3.93*** |
0.999
Persistence577d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2016 | 3.87*** |
α ARCH Response to squared shocks | 0.1994 | 6.93*** |
β GARCH Volatility persistence | 0.7994 | 28.04*** |
Spline Coefficients
K=8
| γ1 | -0.8420 | -1.83* |
| γ2 | 1.3180 | 1.74* |
| γ3 | -3.8208 | -2.67*** |
| γ4 | 9.0825 | 3.25*** |
| γ5 | -9.0545 | -3.55*** |
| γ6 | 4.1453 | 4.19*** |
| γ7 | -1.4433 | -4.43*** |
| γ8 | 1.3944 | 3.93*** |
Persistence:
0.999
Half-life:
577 days
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