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V-Lab

British Pound GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, September 9th, 2026

1 Day

4.58%

decreased by 0.02%

1 Week

4.62%

increased by 0.02%

1 Month

4.78%

increased by 0.18%

Analysis last updated: Tuesday, September 8, 2026 at 07:04 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of British Pound GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 4, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 128 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~128 days
ParamValuet-stat
ωconst0.0012
3.81***
αARCH0.0233
2.67***
βGARCH0.9653
194.38***
γleverage0.0119
0.82

0.995

Persistence

128d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0012
3.81***
α

ARCH

Response to squared shocks

0.0233
2.67***
β

GARCH

Volatility persistence

0.9653
194.38***
γ

leverage

Additional response to negative shocks

0.0119
0.82

Persistence:

0.995

Half-life:

128 days