Columbia Corporate Bond ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, October 23rd, 2026
1 Day
6.06%
increased by 1.20%
1 Week
5.91%
increased by 1.05%
1 Month
5.51%
increased by 0.65%
Analysis last updated: Friday, October 23, 2026 at 02:23 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 11, 2025 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 9 trading days, meaning a shock loses half its impact after approximately 9 days. Returns follow a Student-t distribution with v = 27.49 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 9-day half-lifev = 27.49 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωlong-run | 0.0934 | 3.34*** |
| αscore | 0.0868 | 0.93 |
| βpersistence | 0.9262 | 15.61*** |
| νDF | 27.4909 | 0.06 |
0.926
Persistence9d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω long-run Long-run variance given a price move | 0.0934 | 3.34*** |
α score Weight on the scaled score | 0.0868 | 0.93 |
β persistence Volatility persistence | 0.9262 | 15.61*** |
ν DF Student-t tail thickness | 27.4909 | 0.06 |
Persistence:
0.926
Half-life:
9 days
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