V-Lab
Wal-Mart Stores Inc Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 22nd, 2026
1 Day
4.48
decreased by 0.09
1 Week
4.63
increased by 0.06
1 Month
4.72
increased by 0.15
Analysis last updated: Monday, September 21, 2026 at 09:34 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 812 trading days (~3.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 114% more after negative returns
μ
ILLIQ-AMEM Model
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High persistence: persistence 0.999, shock half-life ~812 daysAsymmetry: Illiquidity rises 114% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0213 | 1.96** |
| αARCH | 0.0224 | 5.48*** |
| βGARCH | 0.9640 | 334.60*** |
| γleverage | 0.0255 | 3.75*** |
0.999
Persistence812d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0213 | 1.96** |
α ARCH Response to squared shocks | 0.0224 | 5.48*** |
β GARCH Volatility persistence | 0.9640 | 334.60*** |
γ leverage Additional response to negative shocks | 0.0255 | 3.75*** |
Persistence:
0.999
Half-life:
812 days
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