Northwest Biotherapeutics Inc Asymmetric ILLIQ Liquidity Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Illiquidity prediction for Friday, November 13th, 2026
1 Day
34,549.97
1 Week
34,935.36
1 Month
40,088.91
Analysis last updated: Friday, November 13, 2026 at 10:10 AM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 14, 2001 to Nov 6, 2026Model Insight
With persistence 1.000, illiquidity shocks have a half-life of 693147 trading days (~2750.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 115% more after negative returns
ILLIQ-AMEM Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 0.11 |
| αARCH | 0.0757 | 5.76*** |
| βGARCH | 0.8806 | 133.00*** |
| γleverage | 0.0873 | 3.84*** |
1.000
Persistence693147d
Half-lifeILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.11 |
α ARCH Response to squared shocks | 0.0757 | 5.76*** |
β GARCH Volatility persistence | 0.8806 | 133.00*** |
γ leverage Additional response to negative shocks | 0.0873 | 3.84*** |
Persistence:
1.000
Half-life:
693147 days
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