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V-Lab

3M US Treasury CMT 3 Month Zero Slope Spline-GARCH Volatility Analysis

High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful

Volatility prediction for Thursday, September 24th, 2026

1 Day

11.60%

increased by 0.05%

1 Week

11.76%

increased by 0.21%

1 Month

12.38%

increased by 0.83%

Analysis last updated: Thursday, September 24, 2026 at 03:00 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of 3M US Treasury CMT 3 Month S0GARCH

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 1.000, volatility shocks have a half-life of 33007 trading days (~131.0 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 1.000, shock half-life ~33007 days
ParamValuet-stat
ωconst1.1840
0.82
αARCH0.1784
0.14
βGARCH0.8216
0.67
γi Spline Coefficients
K=9
γ1-0.2912
-0.65
γ20.3858
0.62
γ3-0.0526
-0.22
γ4-0.2401
-2.42**
γ50.5889
5.25***
γ6-0.6782
-3.72***
γ70.0963
0.78
γ80.4785
2.45**
γ9-0.3472
-1.66*

1.000

Persistence

33007d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1840
0.82
α

ARCH

Response to squared shocks

0.1784
0.14
β

GARCH

Volatility persistence

0.8216
0.67
γi Spline Coefficients
K=9
γ1-0.2912
-0.65
γ20.3858
0.62
γ3-0.0526
-0.22
γ4-0.2401
-2.42**
γ50.5889
5.25***
γ6-0.6782
-3.72***
γ70.0963
0.78
γ80.4785
2.45**
γ9-0.3472
-1.66*

Persistence:

1.000

Half-life:

33007 days