ACI Formulations PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Sunday, October 25th, 2026
1 Day
1,248.80
decreased by 237.81
1 Week
1,248.80
decreased by 237.81
1 Month
816.50
decreased by 670.11
Analysis last updated: Tuesday, October 20, 2026 at 05:58 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Feb 10, 2009 to Oct 19, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 4175 trading days (~16.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
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High persistence: persistence 1.000, shock half-life ~4175 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0383 | 6.21*** |
| αARCH | 0.3132 | 4.43*** |
| βGARCH | 0.6866 | 9.69*** |
Spline Coefficients
K=6
| γ1 | -0.8243 | -1.73* |
| γ2 | 0.5397 | 0.90 |
| γ3 | 1.0658 | 4.58*** |
| γ4 | -2.0252 | -8.61*** |
| γ5 | 2.7171 | 4.84*** |
| γ6 | -3.0519 | -2.12** |
1.000
Persistence4175d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0383 | 6.21*** |
α ARCH Response to squared shocks | 0.3132 | 4.43*** |
β GARCH Volatility persistence | 0.6866 | 9.69*** |
Spline Coefficients
K=6
| γ1 | -0.8243 | -1.73* |
| γ2 | 0.5397 | 0.90 |
| γ3 | 1.0658 | 4.58*** |
| γ4 | -2.0252 | -8.61*** |
| γ5 | 2.7171 | 4.84*** |
| γ6 | -3.0519 | -2.12** |
Persistence:
1.000
Half-life:
4175 days
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