V-Lab
Caterpillar Inc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
7.59
decreased by 0.22
1 Week
7.92
increased by 0.11
1 Month
7.57
decreased by 0.24
Analysis last updated: Friday, September 18, 2026 at 11:16 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 0.994, illiquidity shocks have a half-life of 118 trading days (~0.5 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 0.994, shock half-life ~118 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0964 | 7.37*** |
| αARCH | 0.0540 | 13.32*** |
| βGARCH | 0.9401 | 214.93*** |
Spline Coefficients
K=3
| γ1 | -0.0260 | -8.27*** |
| γ2 | 0.0397 | 8.18*** |
| γ3 | -0.0220 | -4.55*** |
0.994
Persistence118d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0964 | 7.37*** |
α ARCH Response to squared shocks | 0.0540 | 13.32*** |
β GARCH Volatility persistence | 0.9401 | 214.93*** |
Spline Coefficients
K=3
| γ1 | -0.0260 | -8.27*** |
| γ2 | 0.0397 | 8.18*** |
| γ3 | -0.0220 | -4.55*** |
Persistence:
0.994
Half-life:
118 days
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