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
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Aug 28, 2026Model 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
| Parameter | Value | t-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*** |
Spline Coefficients
K=4
| γ1 | -0.0414 | -7.51*** |
| γ2 | 0.0515 | 5.67*** |
| γ3 | -0.0040 | -0.57 |
| γ4 | -0.0058 | -0.69 |
Persistence:
0.994
Half-life:
110 days
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