V-Lab
Grp Ltd Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
9,578.24
decreased by 466.97
1 Week
10,125.26
increased by 80.05
1 Month
10,536.08
increased by 490.87
Analysis last updated: Saturday, September 19, 2026 at 10:17 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Oct 8, 2009 to Sep 18, 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 43 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 | 1.2955 | 3.48*** |
| αARCH | 0.1944 | 9.31*** |
| βGARCH | 0.7896 | 37.15*** |
Spline Coefficients
K=10
| γ1 | -0.2277 | -0.47 |
| γ2 | 1.2085 | 1.30 |
| γ3 | -1.9697 | -1.81* |
| γ4 | 0.6515 | 0.62 |
| γ5 | 1.7250 | 2.15** |
| γ6 | -2.6846 | -3.50*** |
| γ7 | 1.1442 | 1.78* |
| γ8 | 1.7612 | 2.67*** |
| γ9 | -5.7731 | -3.91*** |
| γ10 | 12.0577 | 4.70*** |
0.984
Persistence43d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2955 | 3.48*** |
α ARCH Response to squared shocks | 0.1944 | 9.31*** |
β GARCH Volatility persistence | 0.7896 | 37.15*** |
Spline Coefficients
K=10
| γ1 | -0.2277 | -0.47 |
| γ2 | 1.2085 | 1.30 |
| γ3 | -1.9697 | -1.81* |
| γ4 | 0.6515 | 0.62 |
| γ5 | 1.7250 | 2.15** |
| γ6 | -2.6846 | -3.50*** |
| γ7 | 1.1442 | 1.78* |
| γ8 | 1.7612 | 2.67*** |
| γ9 | -5.7731 | -3.91*** |
| γ10 | 12.0577 | 4.70*** |
Persistence:
0.984
Half-life:
43 days
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