V-Lab
Merck & Co Inc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 22nd, 2026
1 Day
9.72
increased by 0.28
1 Week
9.77
increased by 0.33
1 Month
10.15
increased by 0.71
Analysis last updated: Monday, September 21, 2026 at 09:46 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
With persistence 0.998, illiquidity shocks have a half-life of 401 trading days (~1.6 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 ~401 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0577 | 11.48*** |
| αARCH | 0.0421 | 12.52*** |
| βGARCH | 0.9562 | 280.58*** |
Spline Coefficients
K=1
| γ1 | -0.0020 | -2.31** |
0.998
Persistence401d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0577 | 11.48*** |
α ARCH Response to squared shocks | 0.0421 | 12.52*** |
β GARCH Volatility persistence | 0.9562 | 280.58*** |
Spline Coefficients
K=1
| γ1 | -0.0020 | -2.31** |
Persistence:
0.998
Half-life:
401 days
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