Vistry Group PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, October 13th, 2026
1 Day
4,733.96
decreased by 681.22
1 Week
5,441.09
increased by 25.91
1 Month
5,743.91
increased by 328.73
Analysis last updated: Tuesday, October 13, 2026 at 09:58 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 8, 1997 to Oct 9, 2026Model Insight
This model fits a time-varying baseline (a spline), so illiquidity mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 8 trading days.
μ
ILLIQ-SMEM Model
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Time-varying baseline: illiquidity reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 4.9812 | 2.19** |
| αARCH | 0.1439 | 6.33*** |
| βGARCH | 0.7742 | 27.98*** |
Spline Coefficients
K=8
| γ1 | -0.1167 | -0.95 |
| γ2 | 0.1838 | 1.07 |
| γ3 | 0.0854 | 1.10 |
| γ4 | -0.2908 | -7.72*** |
| γ5 | 0.1091 | 4.51*** |
| γ6 | 0.1328 | 5.79*** |
| γ7 | -0.1969 | -8.25*** |
| γ8 | 0.2608 | 7.74*** |
0.918
Persistence8d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 4.9812 | 2.19** |
α ARCH Response to squared shocks | 0.1439 | 6.33*** |
β GARCH Volatility persistence | 0.7742 | 27.98*** |
Spline Coefficients
K=8
| γ1 | -0.1167 | -0.95 |
| γ2 | 0.1838 | 1.07 |
| γ3 | 0.0854 | 1.10 |
| γ4 | -0.2908 | -7.72*** |
| γ5 | 0.1091 | 4.51*** |
| γ6 | 0.1328 | 5.79*** |
| γ7 | -0.1969 | -8.25*** |
| γ8 | 0.2608 | 7.74*** |
Persistence:
0.918
Half-life:
8 days
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