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V-Lab

Ross Stores Inc GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

31.34%

decreased by 0.53%

1 Week

31.49%

decreased by 0.38%

1 Month

32.09%

increased by 0.22%

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Ross Stores Inc GJR-GARCH

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 0.998, volatility shocks have a half-life of 284 trading days (~1.1 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 367% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0289
8.57***
α

ARCH

Response to squared shocks

0.0134
12.59***
β

GARCH

Volatility persistence

0.9595
850.64***
γ

leverage

Additional response to negative shocks

0.0492
15.43***

Persistence:

0.998

Half-life:

284 days