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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 Monday, August 24th, 2026

1 Day

20,842.38

decreased by 89,291.52

1 Week

58,826.62

decreased by 51,307.28

1 Month

50,096.61

decreased by 60,037.29

Analysis last updated: Saturday, August 22, 2026 at 01:58 PM UTC

Date Range:

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to

6M ·

1Y ·

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graph of Northwest Biotherapeutics Inc ILLIQ-AMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Dec 14, 2001 to Aug 21, 2026
Illiquid Asset

Model Insight

With persistence 1.000, illiquidity shocks have a half-life of 1386294 trading days (~5501.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0000
α

ARCH

Response to squared shocks

0.8407
2.25**
β

GARCH

Volatility persistence

0.0000
0.00
γ

leverage

Additional response to negative shocks

0.3187
0.76

Persistence:

1.000

Half-life:

1386294 days