V-Lab
BB Biotech AG Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Friday, September 11th, 2026
1 Day
38,954.61
increased by 5,637.88
1 Week
35,694.92
increased by 2,378.19
1 Month
29,020.03
decreased by 4,296.70
Analysis last updated: Friday, September 11, 2026 at 07:08 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jun 16, 2000 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 52 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 | 0.5760 | 4.33*** |
| αARCH | 0.1559 | 23.24*** |
| βGARCH | 0.8309 | 149.95*** |
Spline Coefficients
K=2
| γ1 | 0.0007 | 0.15 |
| γ2 | 0.0115 | 1.40 |
0.987
Persistence52d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.5760 | 4.33*** |
α ARCH Response to squared shocks | 0.1559 | 23.24*** |
β GARCH Volatility persistence | 0.8309 | 149.95*** |
Spline Coefficients
K=2
| γ1 | 0.0007 | 0.15 |
| γ2 | 0.0115 | 1.40 |
Persistence:
0.987
Half-life:
52 days
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