V-Lab
Post And Telecommunication ILLIQ-MFMEM Liquidity Analysis
Illiquidity prediction for Friday, September 18th, 2026
1 Day
7,398.13
1 Week
7,991.06
1 Month
8,454.59
Analysis last updated: Friday, September 18, 2026 at 09:24 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 23, 2008 to Sep 15, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 638 trading days (~2.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. This multi-frequency model splits illiquidity into a fast short-run component and a slow-moving long-run level that drifts over the sample rather than a constant baseline.
ILLIQ-MFMEM Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| mwindow | 21 | |
| αARCH | 0.1329 | 5.01*** |
| βGARCH | 0.8260 | 22.22*** |
| γleverage | 0.0800 | 1.34 |
| λ₁tau intercept | 10.0000 | 0.66 |
| λ₂forecast adj. | 0.0265 | 2.00** |
| λ₃tau persistence | 0.9735 | 74.98*** |
0.999
Persistence638d
Half-lifeILLIQ-MFMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 21 | |
α ARCH Response to squared shocks | 0.1329 | 5.01*** |
β GARCH Volatility persistence | 0.8260 | 22.22*** |
γ leverage Additional response to negative shocks | 0.0800 | 1.34 |
λ₁ tau intercept Baseline long-term coefficient | 10.0000 | 0.66 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0265 | 2.00** |
λ₃ tau persistence Long-term factor persistence | 0.9735 | 74.98*** |
Persistence:
0.999
Half-life:
638 days
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