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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

decreased by 1.39

1 Week

34.49

increased by 0.31

1 Month

37.41

increased by 3.23

Analysis last updated: Friday, September 18, 2026 at 11:47 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Simon Property Group Inc ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Dec 14, 1993 to Sep 18, 2026

Model 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

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 1.000, shock half-life ~22359 daysAsymmetry: Illiquidity rises 70% more after negative returns
ParamValuet-stat
ωconst0.1247
1.58
αARCH0.0382
6.40***
βGARCH0.9485
230.11***
γleverage0.0266
3.13***

1.000

Persistence

22359d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-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