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Grafton Group PLC Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Monday, November 9th, 2026

1 Day

6,455.19

increased by 1,082.41

1 Week

6,006.72

increased by 633.94

1 Month

5,164.08

decreased by 208.70

Analysis last updated: Sunday, November 8, 2026 at 03:39 AM UTC

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Date Range:

from

11/06/2024

to

11/06/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Grafton Group PLC ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

May 14, 2001 to Nov 6, 2026

Model Insight

With persistence 0.998, illiquidity shocks have a half-life of 333 trading days (~1.3 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 0.998, shock half-life ~333 days
ParamValuet-stat
ωconst1.8615
3.92***
αARCH0.1842
16.63***
βGARCH0.8137
73.16***
∑γi Spline Coefficients
K=6
γ1-0.6621
-3.27***
γ22.1085
4.77***
γ3-4.0213
-6.90***
γ45.3116
7.50***
γ5-3.8378
-7.32***
γ61.1732
5.56***

0.998

Persistence

333d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.8615
3.92***
α

ARCH

Response to squared shocks

0.1842
16.63***
β

GARCH

Volatility persistence

0.8137
73.16***
∑γi Spline Coefficients
K=6
γ1-0.6621
-3.27***
γ22.1085
4.77***
γ3-4.0213
-6.90***
γ45.3116
7.50***
γ5-3.8378
-7.32***
γ61.1732
5.56***

Persistence:

0.998

Half-life:

333 days