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V-Lab

Ross Stores Inc GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

30.74%

decreased by 1.22%

1 Week

30.85%

decreased by 1.11%

1 Month

31.31%

decreased by 0.65%

Analysis last updated: Tuesday, August 25, 2026 at 09:31 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Ross Stores Inc GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 21, 2026

Model Insight

With persistence 0.999, volatility shocks have a half-life of 551 trading days (~2.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 4.32 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

15.1062
7.96***
α

ARCH

Response to squared shocks

0.0467
77.43***
β

GARCH

Volatility persistence

0.9987
7,623.98***
ν

DF

Student-t tail thickness

4.3216
49.30***

Persistence:

0.999

Half-life:

551 days