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V-Lab

FTSE 100 Index GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

8.43%

decreased by 0.11%

1 Week

8.87%

increased by 0.33%

1 Month

10.26%

increased by 1.72%

Analysis last updated: Tuesday, August 25, 2026 at 05:03 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of FTSE 100 Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Aug 21, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0217
21.55***
α

ARCH

Response to squared shocks

0.0151
8.67***
β

GARCH

Volatility persistence

0.8943
499.31***
γ

leverage

Additional response to negative shocks

0.1372
27.16***

Persistence:

0.978

Half-life:

31 days