V-Lab
International Business Machines Corp Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 14th, 2026
1 Day
13.49
increased by 1.02
1 Week
12.44
decreased by 0.03
1 Month
11.88
decreased by 0.59
Analysis last updated: Saturday, September 12, 2026 at 12:12 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
With persistence 0.998, illiquidity shocks have a half-life of 380 trading days (~1.5 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 0.998, shock half-life ~380 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0579 | 9.59*** |
| αARCH | 0.0500 | 13.79*** |
| βGARCH | 0.9481 | 255.08*** |
Spline Coefficients
K=1
| γ1 | -0.0018 | -2.25** |
0.998
Persistence380d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0579 | 9.59*** |
α ARCH Response to squared shocks | 0.0500 | 13.79*** |
β GARCH Volatility persistence | 0.9481 | 255.08*** |
Spline Coefficients
K=1
| γ1 | -0.0018 | -2.25** |
Persistence:
0.998
Half-life:
380 days
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