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V-Lab

AT&T Inc Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Monday, August 31st, 2026

1 Day

13.81

increased by 1.22

1 Week

12.63

increased by 0.04

1 Month

12.17

decreased by 0.42

Analysis last updated: Friday, August 28, 2026 at 10:59 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of AT&T Inc ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 28, 2026

Model Insight

With persistence 0.994, illiquidity shocks have a half-life of 110 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0994
11.82***
α

ARCH

Response to squared shocks

0.0472
11.79***
β

GARCH

Volatility persistence

0.9466
213.05***
γi Spline Coefficients
K=4
γ1-0.0414
-7.51***
γ20.0515
5.67***
γ3-0.0040
-0.57
γ4-0.0058
-0.69

Persistence:

0.994

Half-life:

110 days