V-Lab
Elementis PLC Spline ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Monday, September 21st, 2026
1 Day
6,160.24
increased by 135.25
1 Week
5,671.41
decreased by 353.58
1 Month
5,320.62
decreased by 704.37
Analysis last updated: Sunday, September 20, 2026 at 03:37 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 17328 trading days (~68.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
Tap to view equation
High persistence: persistence 1.000, shock half-life ~17328 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0106 | 3.61*** |
| αARCH | 0.0539 | 5.74*** |
| βGARCH | 0.9461 | 100.54*** |
Spline Coefficients
K=1
| γ1 | -0.0197 | -3.96*** |
1.000
Persistence17328d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0106 | 3.61*** |
α ARCH Response to squared shocks | 0.0539 | 5.74*** |
β GARCH Volatility persistence | 0.9461 | 100.54*** |
Spline Coefficients
K=1
| γ1 | -0.0197 | -3.96*** |
Persistence:
1.000
Half-life:
17328 days
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