V-Lab
HP Inc Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 22nd, 2026
1 Day
62.83
increased by 1.42
1 Week
62.35
increased by 0.94
1 Month
64.13
increased by 2.72
Analysis last updated: Monday, September 21, 2026 at 09:43 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 347 trading days (~1.4 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 0.998, shock half-life ~347 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.0456 | 9.18*** |
| αARCH | 0.0659 | 14.65*** |
| βGARCH | 0.9321 | 208.29*** |
Spline Coefficients
K=1
| γ1 | -0.0003 | -0.39 |
0.998
Persistence347d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0456 | 9.18*** |
α ARCH Response to squared shocks | 0.0659 | 14.65*** |
β GARCH Volatility persistence | 0.9321 | 208.29*** |
Spline Coefficients
K=1
| γ1 | -0.0003 | -0.39 |
Persistence:
0.998
Half-life:
347 days
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