General Motors Co Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, October 13th, 2026
1 Day
29.07
decreased by 0.61
1 Week
30.77
increased by 1.09
1 Month
31.09
increased by 1.41
Analysis last updated: Monday, October 12, 2026 at 09:48 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Nov 18, 2010 to Oct 9, 2026Model 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
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High persistence: persistence 0.991, shock half-life ~78 daysAsymmetry: illiquidity responds almost entirely to negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.3188 | 2.61*** |
| αARCH | 0.0128 | 1.57 |
| βGARCH | 0.9386 | 138.46*** |
| γleverage | 0.0795 | 4.32*** |
0.991
Persistence78d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3188 | 2.61*** |
α ARCH Response to squared shocks | 0.0128 | 1.57 |
β GARCH Volatility persistence | 0.9386 | 138.46*** |
γ leverage Additional response to negative shocks | 0.0795 | 4.32*** |
Persistence:
0.991
Half-life:
78 days
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