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Bloomberg Global Aggregate Corporate Bond Index Total Return Value Unhedged USD GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, October 16th, 2026

1 Day

4.66%

increased by 0.40%

1 Week

4.67%

increased by 0.41%

1 Month

4.70%

increased by 0.44%

Analysis last updated: Friday, October 16, 2026 at 11:50 PM UTC

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Date Range:

from

10/15/2024

to

10/15/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Bloomberg Global Aggregate Corporate Bond Index Total Return Value Unhedged USD GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 15, 2001 to Oct 8, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 139 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 7.90 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~139 daysv = 7.90 · fat tails
ParamValuet-stat
ωlong-run0.1162
1.54
αscore0.0391
9.27***
βpersistence0.9950
319.94***
νDF7.9026
1.17

0.995

Persistence

139d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

0.1162
1.54
α

score

Weight on the scaled score

0.0391
9.27***
β

persistence

Volatility persistence

0.9950
319.94***
ν

DF

Student-t tail thickness

7.9026
1.17

Persistence:

0.995

Half-life:

139 days