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General Motors Co Asymmetric ILLIQ Liquidity Analysis

Illiquidity prediction for Tuesday, September 1st, 2026

1 Day

28.91

decreased by 1.54

1 Week

32.07

increased by 1.62

1 Month

31.19

increased by 0.74

Analysis last updated: Tuesday, September 1, 2026 at 09:48 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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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 Aug 28, 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

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.3180
2.61***
α

ARCH

Response to squared shocks

0.0131
1.59
β

GARCH

Volatility persistence

0.9384
137.88***
γ

leverage

Additional response to negative shocks

0.0793
4.29***

Persistence:

0.991

Half-life:

78 days