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V-Lab

Dow Jones Transportation Average GJR-GARCH Volatility Analysis

Volatility prediction for Friday, August 14th, 2026

1 Day

19.05%

decreased by 0.15%

1 Week

19.22%

increased by 0.02%

1 Month

19.83%

increased by 0.63%

Analysis last updated: Friday, August 14, 2026 at 12:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Dow Jones Transportation Average 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 7, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 255% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0396
19.53***
α

ARCH

Response to squared shocks

0.0326
11.16***
β

GARCH

Volatility persistence

0.9076
364.93***
γ

leverage

Additional response to negative shocks

0.0831
13.73***

Persistence:

0.982

Half-life:

38 days