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V-Lab

GraniteShares YieldBoost HIMS ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, October 23rd, 2026

1 Day

19.84%

decreased by 1.16%

1 Week

20.26%

decreased by 0.74%

1 Month

21.78%

increased by 0.78%

Analysis last updated: Friday, October 23, 2026 at 02:19 AM UTC

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Date Range:

from

10/22/2024

to

10/22/2026

6M ·

All

graph of GraniteShares YieldBoost HIMS ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 2, 2025 to Oct 16, 2026

Model Insight

With persistence 0.992, volatility shocks have a half-life of 86 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 6.41 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.992, shock half-life ~86 daysv = 6.41 · fat tails
ParamValuet-stat
ωlong-run5.9006
1.40
αscore0.0886
3.29***
βpersistence0.9920
127.95***
νDF6.4074
0.70

0.992

Persistence

86d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

5.9006
1.40
α

score

Weight on the scaled score

0.0886
3.29***
β

persistence

Volatility persistence

0.9920
127.95***
ν

DF

Student-t tail thickness

6.4074
0.70

Persistence:

0.992

Half-life:

86 days