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

Volatility prediction for Wednesday, November 4th, 2026

1 Day

15.47%

decreased by 0.72%

1 Week

15.84%

decreased by 0.35%

1 Month

16.92%

increased by 0.73%

Analysis last updated: Thursday, November 5, 2026 at 12:55 AM UTC

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Date Range:

from

11/03/2024

to

11/03/2026

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 Nov 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***
βGARCH0.8573
89.83***
γleverage0.1453
4.91***

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

0.8573
89.83***
γ

leverage

Additional response to negative shocks

0.1453
4.91***

Persistence:

0.963

Half-life:

18 days