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Aitken Spence Plc Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Monday, July 27th, 2026

1 Day

7,210.68

decreased by 979.59

1 Week

9,525.80

increased by 1,335.53

1 Month

7,606.72

decreased by 583.55

Analysis last updated: Sunday, July 26, 2026 at 05:49 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Aitken Spence Plc ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Aug 11, 1997 to Jul 24, 2026

Model Insight

With persistence 0.993, illiquidity shocks have a half-life of 101 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

3.2977
1.32
α

ARCH

Response to squared shocks

0.1687
5.89***
β

GARCH

Volatility persistence

0.8245
31.28***
γi Spline Coefficients
K=10
γ10.7284
1.69*
γ2-1.5323
-2.75***
γ31.8831
3.41***
γ4-1.7434
-1.94*
γ50.7678
0.83
γ6-0.2385
-0.38
γ70.0005
0.00
γ80.8011
2.36**
γ9-1.5915
-5.87***
γ101.6959
2.69***

Persistence:

0.993

Half-life:

101 days