Skip to main content
V-Lab
V-Lab

General Motors Co Asymmetric ILLIQ Liquidity Analysis

Illiquidity prediction for Tuesday, September 22nd, 2026

1 Day

30.56

decreased by 1.22

1 Week

31.15

decreased by 0.63

1 Month

30.84

decreased by 0.94

Analysis last updated: Monday, September 21, 2026 at 09:43 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of General Motors Co ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Nov 18, 2010 to Sep 18, 2026

Model Insight

With persistence 0.991, illiquidity shocks have a half-life of 78 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Asymmetry: illiquidity responds almost entirely to negative returns

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 0.991, shock half-life ~78 daysAsymmetry: illiquidity responds almost entirely to negative returns
ParamValuet-stat
ωconst0.3187
2.61***
αARCH0.0130
1.59
βGARCH0.9385
138.11***
γleverage0.0794
4.30***

0.991

Persistence

78d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.3187
2.61***
α

ARCH

Response to squared shocks

0.0130
1.59
β

GARCH

Volatility persistence

0.9385
138.11***
γ

leverage

Additional response to negative shocks

0.0794
4.30***

Persistence:

0.991

Half-life:

78 days