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V-Lab

Dogusan Spline ILLIQ Liquidity Analysis

Illiquidity prediction for Monday, September 21st, 2026

1 Day

15,440.68

increased by 11,272.41

1 Week

4,941.23

increased by 772.96

1 Month

2,458.85

decreased by 1,709.42

Analysis last updated: Sunday, September 20, 2026 at 03:17 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Dogusan ILLIQ-SMEM

News Impact Curve

How returns affect tomorrow's illiquidity

Illiquidity Forecast

How illiquidity evolves over time

Parameter Estimates

Mar 28, 1995 to Sep 18, 2026

Model Insight

With persistence 0.995, illiquidity shocks have a half-life of 137 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

ILLIQ-SMEM Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~137 days
ParamValuet-stat
ωconst0.8644
3.71***
αARCH0.2475
16.98***
βGARCH0.7474
55.17***
γi Spline Coefficients
K=10
γ1-1.1201
-5.02***
γ21.5594
5.82***
γ3-0.6943
-4.13***
γ40.5988
3.67***
γ5-0.4443
-3.64***
γ60.2295
2.47**
γ7-0.3549
-3.62***
γ80.3326
2.49**
γ9-0.1473
-0.99
γ100.2459
1.38

0.995

Persistence

137d

Half-life
μ

ILLIQ-SMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.8644
3.71***
α

ARCH

Response to squared shocks

0.2475
16.98***
β

GARCH

Volatility persistence

0.7474
55.17***
γi Spline Coefficients
K=10
γ1-1.1201
-5.02***
γ21.5594
5.82***
γ3-0.6943
-4.13***
γ40.5988
3.67***
γ5-0.4443
-3.64***
γ60.2295
2.47**
γ7-0.3549
-3.62***
γ80.3326
2.49**
γ9-0.1473
-0.99
γ100.2459
1.38

Persistence:

0.995

Half-life:

137 days