V-Lab
Simon Property Group Inc Asymmetric ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Monday, September 21st, 2026
1 Day
32.79
1 Week
34.49
1 Month
37.41
Analysis last updated: Friday, September 18, 2026 at 11:47 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 14, 1993 to Sep 18, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 22359 trading days (~88.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 70% more after negative returns
ILLIQ-AMEM Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1247 | 1.58 |
| αARCH | 0.0382 | 6.40*** |
| βGARCH | 0.9485 | 230.11*** |
| γleverage | 0.0266 | 3.13*** |
1.000
Persistence22359d
Half-lifeILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1247 | 1.58 |
α ARCH Response to squared shocks | 0.0382 | 6.40*** |
β GARCH Volatility persistence | 0.9485 | 230.11*** |
γ leverage Additional response to negative shocks | 0.0266 | 3.13*** |
Persistence:
1.000
Half-life:
22359 days
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