Skip to main content
V-Lab
V-Lab

6M US Treasury CMT 6 Month GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, September 24th, 2026

1 Day

16.61%

increased by 1.07%

1 Week

16.68%

increased by 1.14%

1 Month

16.97%

increased by 1.43%

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of 6M US Treasury CMT 6 Month GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 18, 2026

Model Insight

With persistence 0.999, volatility shocks have a half-life of 519 trading days (~2.1 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 4.23 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 ~519 daysv = 4.23 · fat tails
ParamValuet-stat
ωconst4.7361
3.07***
αARCH0.0773
26.10***
βGARCH0.9987
2,423.94***
νDF4.2275
18.66***

0.999

Persistence

519d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

4.7361
3.07***
α

ARCH

Response to squared shocks

0.0773
26.10***
β

GARCH

Volatility persistence

0.9987
2,423.94***
ν

DF

Student-t tail thickness

4.2275
18.66***

Persistence:

0.999

Half-life:

519 days