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Tokyo Stock Exchange Tokyo Stock Price Index TOPIX GJR-GARCH Volatility Analysis

Volatility prediction for Friday, October 9th, 2026

1 Day

18.55%

increased by 2.33%

1 Week

18.66%

increased by 2.44%

1 Month

18.98%

increased by 2.76%

Analysis last updated: Friday, October 9, 2026 at 07:29 PM UTC

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Date Range:

from

10/08/2024

to

10/08/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Tokyo Stock Exchange Tokyo Stock Price Index TOPIX GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Oct 2, 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

Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
ωconst0.0587
7.08***
αARCH0.0328
2.92***
βGARCH0.8572
89.77***
γleverage0.1457
4.92***

0.963

Persistence

18d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0587
7.08***
α

ARCH

Response to squared shocks

0.0328
2.92***
β

GARCH

Volatility persistence

0.8572
89.77***
γ

leverage

Additional response to negative shocks

0.1457
4.92***

Persistence:

0.963

Half-life:

18 days