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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 Friday, September 11th, 2026

1 Day

38,059.79

increased by 5,958.97

1 Week

33,879.39

increased by 1,778.57

1 Month

25,067.90

decreased by 7,032.92

Analysis last updated: Friday, September 11, 2026 at 07:08 PM UTC

Date Range:

from

to

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

Jun 16, 2000 to Sep 4, 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.

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 1.000, shock half-life ~1386294 days
ParamValuet-stat
ωconst5.0000
0.23
αARCH0.1189
8.25***
βGARCH0.8627
229.45***
γleverage0.0368
1.25

1.000

Persistence

1386294d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
0.23
α

ARCH

Response to squared shocks

0.1189
8.25***
β

GARCH

Volatility persistence

0.8627
229.45***
γ

leverage

Additional response to negative shocks

0.0368
1.25

Persistence:

1.000

Half-life:

1386294 days