CBOE EuroCurrency ETF Volatility Index GAS-GARCH Student T Volatility Analysis
Inactive
Last recorded values (Monday, January 27th, 2025):
1 Day
221.78%
1 Week
218.05%
1 Month
204.38%
Analysis last updated: Wednesday, October 21, 2026 at 01:01 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 1, 2008 to Jan 24, 2025Model Insight
Volatility shocks decay with a half-life of 35 trading days, meaning a shock loses half its impact after approximately 35 days. Returns follow a Student-t distribution with v = 4.29 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
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Shock decay: Shocks decay with a 35-day half-lifev = 4.29 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωlong-run | 35.7896 | 1.27 |
| αscore | 0.0768 | 6.98*** |
| βpersistence | 0.9801 | 67.95*** |
| νDF | 4.2923 | 2.16** |
0.980
Persistence35d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω long-run Long-run variance given a price move | 35.7896 | 1.27 |
α score Weight on the scaled score | 0.0768 | 6.98*** |
β persistence Volatility persistence | 0.9801 | 67.95*** |
ν DF Student-t tail thickness | 4.2923 | 2.16** |
Persistence:
0.980
Half-life:
35 days
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