V-Lab
Simon Property Group Inc ILLIQ-MFMEM Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
28.71
1 Week
29.97
1 Month
34.58
Analysis last updated: Friday, September 18, 2026 at 11:48 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 14, 1993 to Sep 18, 2026Model Insight
Illiquidity shocks decay with a half-life of 6 trading days, meaning a shock loses half its impact after approximately 6 days. 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 | 61 | |
| αARCH | 0.0715 | 10.21*** |
| βGARCH | 0.8554 | 54.23*** |
| γleverage | -0.0715 | -3.14*** |
| λ₁tau intercept | 0.2149 | 2.02** |
| λ₂forecast adj. | 0.1066 | 2.85*** |
| λ₃tau persistence | 0.8881 | 22.88*** |
0.891
Persistence6d
Half-lifeILLIQ-MFMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 61 | |
α ARCH Response to squared shocks | 0.0715 | 10.21*** |
β GARCH Volatility persistence | 0.8554 | 54.23*** |
γ leverage Additional response to negative shocks | -0.0715 | -3.14*** |
λ₁ tau intercept Baseline long-term coefficient | 0.2149 | 2.02** |
λ₂ forecast adj. Forecast performance sensitivity | 0.1066 | 2.85*** |
λ₃ tau persistence Long-term factor persistence | 0.8881 | 22.88*** |
Persistence:
0.891
Half-life:
6 days
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