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1M US Treasury CMT 1 Month GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, September 24th, 2026

1 Day

14.70%

increased by 0.76%

1 Week

14.80%

increased by 0.86%

1 Month

15.19%

increased by 1.25%

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of 1M US Treasury CMT 1 Month GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 31, 2001 to Sep 18, 2026

Model Insight

With persistence 0.999, volatility shocks have a half-life of 693 trading days (~2.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 2.35 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.999, shock half-life ~693 daysv = 2.35 · fat tails
ParamValuet-stat
ωconst6.6335
3.09***
αARCH0.0743
40.67***
βGARCH0.9990
2,938.24***
νDF2.3500
401.85***

0.999

Persistence

693d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

6.6335
3.09***
α

ARCH

Response to squared shocks

0.0743
40.67***
β

GARCH

Volatility persistence

0.9990
2,938.24***
ν

DF

Student-t tail thickness

2.3500
401.85***

Persistence:

0.999

Half-life:

693 days