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V-Lab

Columbia Corporate Bond ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, July 15th, 2026

1 Day

4.70%

decreased by 0.23%

1 Week

4.70%

decreased by 0.23%

1 Month

4.70%

decreased by 0.23%

Analysis last updated: Wednesday, July 15, 2026 at 02:19 AM UTC

Date Range:

from

to

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 Jul 10, 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 = 200.00 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0877
6.74***
α

ARCH

Response to squared shocks

0.1363
2.33**
β

GARCH

Volatility persistence

0.9268
42.63***
ν

DF

Student-t tail thickness

200.0000
0.02

Persistence:

0.927

Half-life:

9 days