V-Lab
Tenaris SA Asymmetric ILLIQ Liquidity Analysis
Illiquidity prediction for Monday, September 21st, 2026
1 Day
504.14
decreased by 31.37
1 Week
537.58
increased by 2.07
1 Month
405.84
decreased by 129.67
Analysis last updated: Saturday, September 19, 2026 at 11:34 PM UTC
News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Dec 17, 2002 to Sep 18, 2026Model Insight
With persistence 0.997, illiquidity shocks have a half-life of 206 trading days (~0.8 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: Illiquidity rises 244% more after negative returns
μ
ILLIQ-AMEM Model
Tap to view equation
High persistence: persistence 0.997, shock half-life ~206 daysAsymmetry: Illiquidity rises 244% more after negative returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.7385 | 2.26** |
| αARCH | 0.0310 | 3.92*** |
| βGARCH | 0.9278 | 147.11*** |
| γleverage | 0.0756 | 4.01*** |
0.997
Persistence206d
Half-lifeμ
ILLIQ-AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.7385 | 2.26** |
α ARCH Response to squared shocks | 0.0310 | 3.92*** |
β GARCH Volatility persistence | 0.9278 | 147.11*** |
γ leverage Additional response to negative shocks | 0.0756 | 4.01*** |
Persistence:
0.997
Half-life:
206 days
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