V-Lab
James Hardie Industries PLC Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Tuesday, September 29th, 2026
1 Day
291.86
decreased by 21.75
1 Week
285.62
decreased by 27.99
1 Month
289.82
decreased by 23.79
Analysis last updated: Tuesday, September 29, 2026 at 05:51 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 2, 1990 to Sep 25, 2026Model Insight
This model fits a time-varying baseline (a spline), so illiquidity mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 39 trading days.
μ
ILLIQ-SMEM Model
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Time-varying baseline: illiquidity reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.2673 | 4.34*** |
| αARCH | 0.0800 | 9.14*** |
| βGARCH | 0.9026 | 81.92*** |
Spline Coefficients
K=4
| γ1 | -0.0624 | -5.39*** |
| γ2 | 0.0953 | 5.73*** |
| γ3 | -0.0472 | -5.53*** |
| γ4 | 0.0330 | 3.94*** |
0.983
Persistence39d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2673 | 4.34*** |
α ARCH Response to squared shocks | 0.0800 | 9.14*** |
β GARCH Volatility persistence | 0.9026 | 81.92*** |
Spline Coefficients
K=4
| γ1 | -0.0624 | -5.39*** |
| γ2 | 0.0953 | 5.73*** |
| γ3 | -0.0472 | -5.53*** |
| γ4 | 0.0330 | 3.94*** |
Persistence:
0.983
Half-life:
39 days
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