V-Lab
Boston Scientific Corp Spline ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Monday, September 21st, 2026
1 Day
21.58
decreased by 1.35
1 Week
23.88
increased by 0.95
1 Month
22.97
increased by 0.04
Analysis last updated: Friday, September 18, 2026 at 11:15 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
May 20, 1992 to Sep 18, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 231049 trading days (~916.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
Tap to view equation
High persistence: persistence 1.000, shock half-life ~231049 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.1695 | 5.93*** |
| αARCH | 0.0721 | 4.27*** |
| βGARCH | 0.9279 | 55.04*** |
Spline Coefficients
K=1
| γ1 | 0.0130 | 1.47 |
1.000
Persistence231049d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.1695 | 5.93*** |
α ARCH Response to squared shocks | 0.0721 | 4.27*** |
β GARCH Volatility persistence | 0.9279 | 55.04*** |
Spline Coefficients
K=1
| γ1 | 0.0130 | 1.47 |
Persistence:
1.000
Half-life:
231049 days
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