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V-Lab

30Y US Treasury 30 Year Zero Coupon Yield Continuously Compounded GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

15.99%

decreased by 0.27%

1 Week

16.06%

decreased by 0.20%

1 Month

16.30%

increased by 0.04%

Analysis last updated: Wednesday, September 23, 2026 at 03:05 AM UTC

Date Range:

from

to

6M ·

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2Y ·

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10Y ·

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graph of 30Y US Treasury 30 Year Zero Coupon Yield Continuously Compounded GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

With persistence 0.996, volatility shocks have a half-life of 182 trading days (~0.7 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 0.996, shock half-life ~182 days
ParamValuet-stat
ωconst0.0079
3.63***
αARCH0.0404
4.60***
βGARCH0.9441
171.55***
γleverage0.0235
1.26

0.996

Persistence

182d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0079
3.63***
α

ARCH

Response to squared shocks

0.0404
4.60***
β

GARCH

Volatility persistence

0.9441
171.55***
γ

leverage

Additional response to negative shocks

0.0235
1.26

Persistence:

0.996

Half-life:

182 days