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Bloomberg US Treasury 20+ Yr Bond Index Total Return Value Unhedged USD GJR-GARCH Volatility Analysis

Volatility prediction for Friday, October 16th, 2026

1 Day

10.98%

increased by 0.93%

1 Week

11.00%

increased by 0.95%

1 Month

11.08%

increased by 1.03%

Analysis last updated: Friday, October 16, 2026 at 11:49 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 US Treasury 20+ Yr Bond Index Total Return Value Unhedged USD GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 28, 1994 to Oct 8, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 144 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~144 days
ParamValuet-stat
ωconst0.0033
2.74***
αARCH0.0446
4.06***
βGARCH0.9578
197.28***
γleverage-0.0144
-0.97

0.995

Persistence

144d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0033
2.74***
α

ARCH

Response to squared shocks

0.0446
4.06***
β

GARCH

Volatility persistence

0.9578
197.28***
γ

leverage

Additional response to negative shocks

-0.0144
-0.97

Persistence:

0.995

Half-life:

144 days