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V-Lab

20Y US Treasury 20 Year Zero Coupon Yield Continuously Compounded GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

12.98%

increased by 0.01%

1 Week

13.02%

increased by 0.05%

1 Month

13.18%

increased by 0.21%

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

Date Range:

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to

6M ·

1Y ·

2Y ·

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10Y ·

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graph of 20Y US Treasury 20 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 0.999, volatility shocks have a half-life of 868 trading days (~3.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 124% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 0.999, shock half-life ~868 daysLeverage: Negative returns increase volatility 124% more than positive returns
ParamValuet-stat
ωconst0.0027
1.39
αARCH0.0229
5.15***
βGARCH0.9620
234.81***
γleverage0.0285
2.41**

0.999

Persistence

868d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0027
1.39
α

ARCH

Response to squared shocks

0.0229
5.15***
β

GARCH

Volatility persistence

0.9620
234.81***
γ

leverage

Additional response to negative shocks

0.0285
2.41**

Persistence:

0.999

Half-life:

868 days