V-Lab
Prologis Inc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
18.66
decreased by 0.86
1 Week
19.24
decreased by 0.28
1 Month
17.83
decreased by 1.69
Analysis last updated: Friday, September 18, 2026 at 11:43 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Nov 21, 1997 to Sep 18, 2026Model Insight
With persistence 0.997, illiquidity shocks have a half-life of 200 trading days (~0.8 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 0.997, shock half-life ~200 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2841 | 6.24*** |
| αARCH | 0.0518 | 8.16*** |
| βGARCH | 0.9448 | 119.47*** |
Spline Coefficients
K=3
| γ1 | -0.0212 | -2.18** |
| γ2 | 0.0347 | 2.24** |
| γ3 | -0.0184 | -1.31 |
0.997
Persistence200d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2841 | 6.24*** |
α ARCH Response to squared shocks | 0.0518 | 8.16*** |
β GARCH Volatility persistence | 0.9448 | 119.47*** |
Spline Coefficients
K=3
| γ1 | -0.0212 | -2.18** |
| γ2 | 0.0347 | 2.24** |
| γ3 | -0.0184 | -1.31 |
Persistence:
0.997
Half-life:
200 days
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