V-Lab
Bank of New York Mellon Corp/The 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 14th, 2026
1 Day
22.83
decreased by 1.99
1 Week
25.99
increased by 1.17
1 Month
32.30
increased by 7.48
Analysis last updated: Friday, September 11, 2026 at 11:48 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 15753 trading days (~62.5 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 ~15753 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.9966 | 6.31*** |
| αARCH | 0.1156 | 2.55** |
| βGARCH | 0.8843 | 19.64*** |
Spline Coefficients
K=9
| γ1 | 0.1831 | 0.65 |
| γ2 | -0.4617 | -0.98 |
| γ3 | 0.2332 | 0.96 |
| γ4 | 0.4284 | 0.65 |
| γ5 | -0.7722 | -0.84 |
| γ6 | 0.5989 | 0.87 |
| γ7 | -0.2887 | -0.81 |
| γ8 | 0.1262 | 0.82 |
| γ9 | -0.0721 | -0.55 |
1.000
Persistence15753d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9966 | 6.31*** |
α ARCH Response to squared shocks | 0.1156 | 2.55** |
β GARCH Volatility persistence | 0.8843 | 19.64*** |
Spline Coefficients
K=9
| γ1 | 0.1831 | 0.65 |
| γ2 | -0.4617 | -0.98 |
| γ3 | 0.2332 | 0.96 |
| γ4 | 0.4284 | 0.65 |
| γ5 | -0.7722 | -0.84 |
| γ6 | 0.5989 | 0.87 |
| γ7 | -0.2887 | -0.81 |
| γ8 | 0.1262 | 0.82 |
| γ9 | -0.0721 | -0.55 |
Persistence:
1.000
Half-life:
15753 days
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