V-Lab
American Tower Corp Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
27.81
decreased by 0.52
1 Week
29.39
increased by 1.06
1 Month
29.87
increased by 1.54
Analysis last updated: Friday, September 18, 2026 at 11:07 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Feb 27, 1998 to Sep 18, 2026Model Insight
With persistence 0.997, illiquidity shocks have a half-life of 216 trading days (~0.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 109% more after negative returns
μ
ILLIQ-AMEM Model
Tap to view equation
High persistence: persistence 0.997, shock half-life ~216 daysAsymmetry: Illiquidity rises 109% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.3474 | 3.78*** |
| αARCH | 0.0565 | 7.37*** |
| βGARCH | 0.9094 | 184.87*** |
| γleverage | 0.0618 | 4.85*** |
0.997
Persistence216d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3474 | 3.78*** |
α ARCH Response to squared shocks | 0.0565 | 7.37*** |
β GARCH Volatility persistence | 0.9094 | 184.87*** |
γ leverage Additional response to negative shocks | 0.0618 | 4.85*** |
Persistence:
0.997
Half-life:
216 days
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