V-Lab
BB Biotech AG Asymmetric ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Monday, August 24th, 2026
1 Day
19,057.52
1 Week
21,566.43
1 Month
22,754.32
Analysis last updated: Saturday, August 22, 2026 at 08:13 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jun 16, 2000 to Aug 21, 2026Model Insight
Estimated persistence of 1.000 is at or above 1 (non-stationary): illiquidity shocks do not decay and the long-run level is undefined, so long-horizon forecasts should be treated with caution.
Asymmetry: Illiquidity rises 31% more after negative returns
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.90 |
α ARCH Response to squared shocks | 0.1190 | 33.00*** |
β GARCH Volatility persistence | 0.8624 | 915.54*** |
γ leverage Additional response to negative shocks | 0.0371 | 5.03*** |
Persistence:
1.000
Half-life:
-
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