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Simon Property Group Inc Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Monday, September 21st, 2026

1 Day

29.12

decreased by 1.21

1 Week

30.48

increased by 0.15

1 Month

33.93

increased by 3.60

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-SMEM

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 0.997, illiquidity shocks have a half-life of 210 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-SMEM Model

Tap to view equation

High persistence: persistence 0.997, shock half-life ~210 days
ParamValuet-stat
ωconst1.1928
8.85***
αARCH0.0535
11.58***
βGARCH0.9432
185.38***
γi Spline Coefficients
K=3
γ1-0.0322
-4.79***
γ20.0557
4.82***
γ3-0.0346
-3.20***

0.997

Persistence

210d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1928
8.85***
α

ARCH

Response to squared shocks

0.0535
11.58***
β

GARCH

Volatility persistence

0.9432
185.38***
γi Spline Coefficients
K=3
γ1-0.0322
-4.79***
γ20.0557
4.82***
γ3-0.0346
-3.20***

Persistence:

0.997

Half-life:

210 days