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GPI for Urban Growth Asymmetric ILLIQ Liquidity Analysis

Illiquidity prediction for Sunday, September 20th, 2026

1 Day

981.85

decreased by 38.47

1 Week

984.79

decreased by 35.53

1 Month

944.25

decreased by 76.07

Analysis last updated: Friday, September 18, 2026 at 06:55 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of GPI for Urban Growth ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Sep 26, 2012 to Sep 17, 2026

Model Insight

With persistence 0.998, illiquidity shocks have a half-life of 309 trading days (~1.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-AMEM Model

Tap to view equation

High persistence: persistence 0.998, shock half-life ~309 days
ParamValuet-stat
ωconst5.0000
0.13
αARCH0.0000
0.00
βGARCH0.9574
45.34***
γleverage0.0807
4.10***

0.998

Persistence

309d

Half-life
μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
0.13
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.9574
45.34***
γ

leverage

Additional response to negative shocks

0.0807
4.10***

Persistence:

0.998

Half-life:

309 days