V-Lab
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
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Nov 18, 2010 to Aug 28, 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
Tap to view equation
| Parameter | Value | t-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
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