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V-Lab

TD Active US HI Yild BND ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

329.39%

increased by 43.15%

1 Week

327.78%

increased by 41.54%

1 Month

321.48%

increased by 35.24%

Analysis last updated: Wednesday, August 26, 2026 at 07:30 PM UTC

Date Range:

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to

6M ·

1Y ·

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graph of TD Active US HI Yild BND ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 26, 2019 to Aug 21, 2026

Model Insight

The estimated Student-t degrees of freedom v = 2.00 sit at the infinite-variance boundary (v → 2): the model is attributing extreme moves to heavy tails rather than to volatility, so the volatility scale is unreliable here. See the boundary-parameters flag.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

19.2992
10.12***
α

ARCH

Response to squared shocks

0.0971
100.34***
β

GARCH

Volatility persistence

0.9949
1,870.05***
ν

DF

Student-t tail thickness

2.0001

Persistence:

0.995

Half-life:

135 days