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SSP Group Plc Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Tuesday, September 22nd, 2026

1 Day

5,506.07

increased by 510.09

1 Week

5,201.38

increased by 205.40

1 Month

4,539.15

decreased by 456.83

Analysis last updated: Tuesday, September 22, 2026 at 08:46 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of SSP Group Plc ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Jul 9, 2014 to Sep 18, 2026

Model Insight

With persistence 0.995, illiquidity shocks have a half-life of 151 trading days (~0.6 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 0.995, shock half-life ~151 days
ParamValuet-stat
ωconst1.1801
5.51***
αARCH0.0639
8.06***
βGARCH0.9315
117.36***
γi Spline Coefficients
K=1
γ10.0035
0.42

0.995

Persistence

151d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1801
5.51***
α

ARCH

Response to squared shocks

0.0639
8.06***
β

GARCH

Volatility persistence

0.9315
117.36***
γi Spline Coefficients
K=1
γ10.0035
0.42

Persistence:

0.995

Half-life:

151 days