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V-Lab

Dow Jones South Africa Index GJR-GARCH Volatility Analysis

Volatility prediction for Friday, July 10th, 2026

1 Day

18.39%

decreased by 0.59%

1 Week

18.39%

decreased by 0.59%

1 Month

18.38%

decreased by 0.60%

Analysis last updated: Friday, July 10, 2026 at 08:30 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Dow Jones South Africa Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1992 to Apr 30, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 251% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0306
24.14***
α

ARCH

Response to squared shocks

0.0374
14.98***
β

GARCH

Volatility persistence

0.8928
364.26***
γ

leverage

Additional response to negative shocks

0.0938
15.36***

Persistence:

0.977

Half-life:

30 days