V-Lab
British American Tobacco Kenya Ltd Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 7th, 2026
1 Day
1,832.18
increased by 202.92
1 Week
1,478.02
decreased by 151.24
1 Month
1,298.75
decreased by 330.51
Analysis last updated: Sunday, September 6, 2026 at 12:00 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 14, 1991 to Sep 4, 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 4 trading days.
μ
ILLIQ-SMEM Model
Tap to view equation
Time-varying baseline: illiquidity reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.8041 | 5.49*** |
| αARCH | 0.0736 | 5.05*** |
| βGARCH | 0.7717 | 13.22*** |
Spline Coefficients
K=7
| γ1 | 0.1519 | 4.97*** |
| γ2 | -0.3065 | -6.59*** |
| γ3 | 0.2784 | 5.42*** |
| γ4 | -0.1571 | -2.92*** |
| γ5 | 0.0526 | 1.15 |
| γ6 | -0.0666 | -1.69* |
| γ7 | -0.0341 | -0.71 |
0.845
Persistence4d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.8041 | 5.49*** |
α ARCH Response to squared shocks | 0.0736 | 5.05*** |
β GARCH Volatility persistence | 0.7717 | 13.22*** |
Spline Coefficients
K=7
| γ1 | 0.1519 | 4.97*** |
| γ2 | -0.3065 | -6.59*** |
| γ3 | 0.2784 | 5.42*** |
| γ4 | -0.1571 | -2.92*** |
| γ5 | 0.0526 | 1.15 |
| γ6 | -0.0666 | -1.69* |
| γ7 | -0.0341 | -0.71 |
Persistence:
0.845
Half-life:
4 days
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