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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, October 26th, 2026

1 Day

4,020.37

increased by 400.39

1 Week

3,814.61

increased by 194.63

1 Month

3,209.76

decreased by 410.22

Analysis last updated: Sunday, October 25, 2026 at 09:04 AM UTC

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Date Range:

from

10/23/2024

to

10/23/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of BB Biotech AG ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Nov 15, 1993 to Oct 23, 2026

Model Insight

With persistence 1.000, illiquidity shocks have a half-life of 1386294 trading days (~5501.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Asymmetry: Illiquidity rises 92% more after negative returns

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 1.000, shock half-life ~1386294 daysAsymmetry: Illiquidity rises 92% more after negative returns
ParamValuet-stat
ωconst5.0000
0.99
αARCH0.0604
5.47***
βGARCH0.9116
162.68***
γleverage0.0558
2.85***

1.000

Persistence

1386294d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
0.99
α

ARCH

Response to squared shocks

0.0604
5.47***
β

GARCH

Volatility persistence

0.9116
162.68***
γ

leverage

Additional response to negative shocks

0.0558
2.85***

Persistence:

1.000

Half-life:

1386294 days