V-Lab
General Motors Co Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Wednesday, August 12th, 2026
1 Day
25.61
decreased by 0.57
1 Week
26.46
increased by 0.28
1 Month
26.80
increased by 0.62
Analysis last updated: Tuesday, August 11, 2026 at 10:19 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Nov 18, 2010 to Aug 7, 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 | 0.3183 | 10.35*** |
α ARCH Response to squared shocks | 0.0127 | 6.22*** |
β GARCH Volatility persistence | 0.9384 | 550.72*** |
γ leverage Additional response to negative shocks | 0.0801 | 17.32*** |
Persistence:
0.991
Half-life:
78 days
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