V-Lab
Travelzoo Inc MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
68.39%
increased by 0.30%
1 Week
72.27%
increased by 4.18%
1 Month
75.81%
increased by 7.72%
Analysis last updated: Friday, September 18, 2026 at 11:01 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 29, 2002 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 2 trading days, meaning a shock loses half its impact after approximately 2 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 2-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 66 | |
| αARCH | 0.1545 | 4.45*** |
| βGARCH | 0.5220 | 6.79*** |
| γleverage | -0.0527 | -1.13 |
| λ₁tau intercept | 0.3695 | 1.79* |
| λ₂forecast adj. | 0.0455 | 2.15** |
| λ₃tau persistence | 0.9347 | 32.03*** |
0.650
Persistence2d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 66 | |
α ARCH Response to squared shocks | 0.1545 | 4.45*** |
β GARCH Volatility persistence | 0.5220 | 6.79*** |
γ leverage Additional response to negative shocks | -0.0527 | -1.13 |
λ₁ tau intercept Baseline long-term coefficient | 0.3695 | 1.79* |
λ₂ forecast adj. Forecast performance sensitivity | 0.0455 | 2.15** |
λ₃ tau persistence Long-term factor persistence | 0.9347 | 32.03*** |
Persistence:
0.650
Half-life:
2 days
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