V-Lab
Halcyon Technology PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Friday, September 18th, 2026
1 Day
9,435.15
increased by 3,074.96
1 Week
6,201.01
decreased by 159.18
1 Month
4,688.13
decreased by 1,672.06
Analysis last updated: Friday, September 18, 2026 at 09:11 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Mar 30, 2009 to Sep 14, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 794 trading days (~3.1 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 0.999, shock half-life ~794 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.4036 | 3.89*** |
| αARCH | 0.1656 | 16.18*** |
| βGARCH | 0.8335 | 82.26*** |
Spline Coefficients
K=2
| γ1 | -0.1416 | -3.42*** |
| γ2 | 0.3219 | 4.41*** |
0.999
Persistence794d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.4036 | 3.89*** |
α ARCH Response to squared shocks | 0.1656 | 16.18*** |
β GARCH Volatility persistence | 0.8335 | 82.26*** |
Spline Coefficients
K=2
| γ1 | -0.1416 | -3.42*** |
| γ2 | 0.3219 | 4.41*** |
Persistence:
0.999
Half-life:
794 days
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