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Johnson Service Group PLC Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Friday, August 14th, 2026

1 Day

4,831.65

decreased by 377.92

1 Week

5,410.41

increased by 200.84

1 Month

5,067.10

decreased by 142.47

Analysis last updated: Friday, August 14, 2026 at 08:38 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Johnson Service Group PLC ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Jun 2, 1995 to Aug 7, 2026

Model Insight

With persistence 0.997, illiquidity shocks have a half-life of 204 trading days (~0.8 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

1.5666
3.40***
α

ARCH

Response to squared shocks

0.0771
5.55***
β

GARCH

Volatility persistence

0.9195
65.38***
γi Spline Coefficients
K=9
γ1-0.2093
-0.99
γ20.2338
0.82
γ3-0.5708
-1.03
γ41.7900
1.37
γ5-1.8499
-1.47
γ60.2588
0.43
γ70.7755
1.52
γ8-0.6254
-1.59
γ90.2170
0.85

Persistence:

0.997

Half-life:

204 days