V-Lab
SSP Group Plc Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 22nd, 2026
1 Day
5,362.50
increased by 266.14
1 Week
5,301.18
increased by 204.82
1 Month
4,575.83
decreased by 520.53
Analysis last updated: Tuesday, September 22, 2026 at 08:45 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jul 9, 2014 to Sep 18, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 1179 trading days (~4.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-AMEM Model
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High persistence: persistence 0.999, shock half-life ~1179 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 0.72 |
| αARCH | 0.0439 | 2.58*** |
| βGARCH | 0.9414 | 134.82*** |
| γleverage | 0.0281 | 0.97 |
0.999
Persistence1179d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.72 |
α ARCH Response to squared shocks | 0.0439 | 2.58*** |
β GARCH Volatility persistence | 0.9414 | 134.82*** |
γ leverage Additional response to negative shocks | 0.0281 | 0.97 |
Persistence:
0.999
Half-life:
1179 days
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