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V-Lab

20Y US Treasury CMT 20 Year Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, November 9th, 2026

1 Day

16.10%

decreased by 0.27%

1 Week

16.18%

decreased by 0.19%

1 Month

16.51%

increased by 0.14%

Analysis last updated: Saturday, November 7, 2026 at 04:01 AM UTC

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Date Range:

from

11/06/2024

to

11/06/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of 20Y US Treasury CMT 20 Year S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 1, 1993 to Nov 6, 2026

Model Insight

With persistence 0.998, volatility shocks have a half-life of 355 trading days (~1.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

High persistence: persistence 0.998, shock half-life ~355 days
ParamValuet-stat
ωconst0.9004
4.49***
αARCH0.0432
8.14***
βGARCH0.9549
174.54***
∑γi Spline Coefficients
K=1
γ1-0.0004
-1.24

0.998

Persistence

355d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.9004
4.49***
α

ARCH

Response to squared shocks

0.0432
8.14***
β

GARCH

Volatility persistence

0.9549
174.54***
∑γi Spline Coefficients
K=1
γ1-0.0004
-1.24

Persistence:

0.998

Half-life:

355 days