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 Wednesday, October 28th, 2026
1 Day
35.55
1 Week
37.02
1 Month
30.91
Analysis last updated: Tuesday, October 27, 2026 at 10:36 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 14, 1993 to Oct 23, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 17328 trading days (~68.8 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 | 0.1258 | 1.61 |
| αARCH | 0.0382 | 6.39*** |
| βGARCH | 0.9485 | 229.83*** |
| γleverage | 0.0266 | 3.14*** |
1.000
Persistence17328d
Half-lifeILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1258 | 1.61 |
α ARCH Response to squared shocks | 0.0382 | 6.39*** |
β GARCH Volatility persistence | 0.9485 | 229.83*** |
γ leverage Additional response to negative shocks | 0.0266 | 3.14*** |
Persistence:
1.000
Half-life:
17328 days
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