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ACI Formulations PLC Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Tuesday, September 8th, 2026

1 Day

984.17

decreased by 186.79

1 Week

895.28

decreased by 275.68

1 Month

535.90

decreased by 635.06

Analysis last updated: Tuesday, September 8, 2026 at 07:20 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of ACI Formulations PLC ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Feb 10, 2009 to Sep 3, 2026

Model Insight

With persistence 1.000, illiquidity shocks have a half-life of 1423 trading days (~5.6 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 1.000, shock half-life ~1423 days
ParamValuet-stat
ωconst1.0623
6.73***
αARCH0.3130
12.63***
βGARCH0.6865
27.70***
γi Spline Coefficients
K=6
γ1-0.5753
-1.18
γ20.1894
0.30
γ31.2540
4.84***
γ4-2.1733
-7.11***
γ52.7586
4.01***
γ6-2.7610
-1.90*

1.000

Persistence

1423d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0623
6.73***
α

ARCH

Response to squared shocks

0.3130
12.63***
β

GARCH

Volatility persistence

0.6865
27.70***
γi Spline Coefficients
K=6
γ1-0.5753
-1.18
γ20.1894
0.30
γ31.2540
4.84***
γ4-2.1733
-7.11***
γ52.7586
4.01***
γ6-2.7610
-1.90*

Persistence:

1.000

Half-life:

1423 days