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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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Date Range:

from

10/02/2024

to

10/02/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Montanaro UK Smaller Companies Investment Trust PLC ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Jan 2, 2007 to Oct 2, 2026

Model 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

Tap to view equation

High persistence: persistence 1.000, shock half-life ~231049 days
ParamValuet-stat
ωconst0.9974
αARCH0.1166
βGARCH0.8834
∑γi Spline Coefficients
K=10
γ10.6917
γ2-0.4871
γ3-3.9349
γ49.6622
γ5-10.9768
γ68.0752
γ7-4.4210
γ81.8515
γ9-0.6785
γ100.8111

1.000

Persistence

231049d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.9974
α

ARCH

Response to squared shocks

0.1166
β

GARCH

Volatility persistence

0.8834
∑γi Spline Coefficients
K=10
γ10.6917
γ2-0.4871
γ3-3.9349
γ49.6622
γ5-10.9768
γ68.0752
γ7-4.4210
γ81.8515
γ9-0.6785
γ100.8111

Persistence:

1.000

Half-life:

231049 days