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Bank of New York Mellon Corp/The Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 28th, 2026
1 Day
19.33
decreased by 1.47
1 Week
20.92
increased by 0.12
1 Month
24.27
increased by 3.47
Analysis last updated: Saturday, September 26, 2026 at 12:02 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 25, 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 13 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 | 3.7545 | 9.49*** |
| αARCH | 0.1172 | 5.39*** |
| βGARCH | 0.8319 | 32.84*** |
Spline Coefficients
K=8
| γ1 | 0.0074 | 0.48 |
| γ2 | 0.0044 | 0.18 |
| γ3 | -0.0163 | -0.84 |
| γ4 | 0.0250 | 1.78* |
| γ5 | -0.0447 | -2.36** |
| γ6 | 0.0534 | 1.66* |
| γ7 | -0.0360 | -1.30 |
| γ8 | -0.0130 | -0.32 |
0.949
Persistence13d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 3.7545 | 9.49*** |
α ARCH Response to squared shocks | 0.1172 | 5.39*** |
β GARCH Volatility persistence | 0.8319 | 32.84*** |
Spline Coefficients
K=8
| γ1 | 0.0074 | 0.48 |
| γ2 | 0.0044 | 0.18 |
| γ3 | -0.0163 | -0.84 |
| γ4 | 0.0250 | 1.78* |
| γ5 | -0.0447 | -2.36** |
| γ6 | 0.0534 | 1.66* |
| γ7 | -0.0360 | -1.30 |
| γ8 | -0.0130 | -0.32 |
Persistence:
0.949
Half-life:
13 days
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