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V-Lab

Nikkei 225 GJR-GARCH Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

30.11%

decreased by 1.88%

1 Week

29.78%

decreased by 2.21%

1 Month

28.68%

decreased by 3.31%

Analysis last updated: Friday, August 21, 2026 at 07:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Nikkei 225 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

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 395% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0657
27.13***
α

ARCH

Response to squared shocks

0.0352
11.44***
β

GARCH

Volatility persistence

0.8657
348.81***
γ

leverage

Additional response to negative shocks

0.1393
18.36***

Persistence:

0.971

Half-life:

23 days