SBA Communications Corp Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Wednesday, October 28th, 2026
1 Day
87.57
decreased by 3.22
1 Week
94.56
increased by 3.77
1 Month
88.67
decreased by 2.12
Analysis last updated: Tuesday, October 27, 2026 at 10:17 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jun 16, 1999 to Oct 23, 2026Model Insight
With persistence 0.993, illiquidity shocks have a half-life of 101 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
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High persistence: persistence 0.993, shock half-life ~101 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1329 | 8.81*** |
| αARCH | 0.0806 | 13.51*** |
| βGARCH | 0.9126 | 155.39*** |
Spline Coefficients
K=3
| γ1 | -0.0168 | -2.35** |
| γ2 | 0.0387 | 3.28*** |
| γ3 | -0.0273 | -2.28** |
0.993
Persistence101d
Half-lifeμ
ILLIQ-SMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1329 | 8.81*** |
α ARCH Response to squared shocks | 0.0806 | 13.51*** |
β GARCH Volatility persistence | 0.9126 | 155.39*** |
Spline Coefficients
K=3
| γ1 | -0.0168 | -2.35** |
| γ2 | 0.0387 | 3.28*** |
| γ3 | -0.0273 | -2.28** |
Persistence:
0.993
Half-life:
101 days
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