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Johnson Service Group PLC Asymmetric ILLIQ Liquidity Analysis

High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful

Illiquidity prediction for Friday, August 14th, 2026

1 Day

6,063.05

decreased by 159.71

1 Week

6,307.87

increased by 85.11

1 Month

6,488.69

increased by 265.93

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-AMEM

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

Estimated persistence of 1.000 is at or above 1 (non-stationary): illiquidity shocks do not decay and the long-run level is undefined, so long-horizon forecasts should be treated with caution.

μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
0.53
α

ARCH

Response to squared shocks

0.0250
16.49***
β

GARCH

Volatility persistence

0.9735
879.43***
γ

leverage

Additional response to negative shocks

0.0029
0.91

Persistence:

1.000

Half-life:

-