V-Lab
Beijing Sifang Automation Co Ltd ILLIQ-MFMEM Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Wednesday, September 23rd, 2026
1 Day
20.20
1 Week
22.35
1 Month
25.69
Analysis last updated: Wednesday, September 23, 2026 at 06:01 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jan 3, 2011 to Sep 18, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 8301 trading days (~32.9 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.
Asymmetry: Illiquidity rises 26% more after negative returns
ILLIQ-MFMEM Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| mwindow | 51 | |
| αARCH | 0.2325 | 19.03*** |
| βGARCH | 0.7367 | 69.04*** |
| γleverage | 0.0615 | 4.19*** |
| λ₁tau intercept | 2.5026 | 0.00 |
| λ₂forecast adj. | 1.0000 | 51.48*** |
| λ₃tau persistence | 0.0000 | 0.00 |
1.000
Persistence8301d
Half-lifeILLIQ-MFMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 51 | |
α ARCH Response to squared shocks | 0.2325 | 19.03*** |
β GARCH Volatility persistence | 0.7367 | 69.04*** |
γ leverage Additional response to negative shocks | 0.0615 | 4.19*** |
λ₁ tau intercept Baseline long-term coefficient | 2.5026 | 0.00 |
λ₂ forecast adj. Forecast performance sensitivity | 1.0000 | 51.48*** |
λ₃ tau persistence Long-term factor persistence | 0.0000 | 0.00 |
Persistence:
1.000
Half-life:
8301 days
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