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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

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Date Range:

from

10/22/2024

to

10/22/2026

6M ·

All

graph of Columbia Corporate Bond ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 11, 2025 to Oct 16, 2026

Model 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

Tap to view equation

Shock decay: Shocks decay with a 9-day half-lifev = 27.49 · fat tails
ParamValuet-stat
ωlong-run0.0934
3.34***
αscore0.0868
0.93
βpersistence0.9262
15.61***
νDF27.4909
0.06

0.926

Persistence

9d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-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