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Pfizer Inc Asymmetric ILLIQ Liquidity Analysis

Illiquidity prediction for Friday, September 25th, 2026

1 Day

9.08

decreased by 0.14

1 Week

9.40

increased by 0.18

1 Month

10.76

increased by 1.54

Analysis last updated: Thursday, September 24, 2026 at 09:43 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Pfizer Inc ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

With persistence 0.999, illiquidity shocks have a half-life of 1361 trading days (~5.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Asymmetry: Illiquidity rises 101% more after negative returns

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 0.999, shock half-life ~1361 daysAsymmetry: Illiquidity rises 101% more after negative returns
ParamValuet-stat
ωconst0.0293
1.18
αARCH0.0325
5.50***
βGARCH0.9505
285.43***
γleverage0.0330
2.73***

0.999

Persistence

1361d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0293
1.18
α

ARCH

Response to squared shocks

0.0325
5.50***
β

GARCH

Volatility persistence

0.9505
285.43***
γ

leverage

Additional response to negative shocks

0.0330
2.73***

Persistence:

0.999

Half-life:

1361 days