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

Volatility prediction for Thursday, October 15th, 2026

1 Day

15.47%

decreased by 0.53%

1 Week

15.83%

decreased by 0.17%

1 Month

16.93%

increased by 0.93%

Analysis last updated: Thursday, October 15, 2026 at 05:59 PM UTC

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Date Range:

from

10/14/2024

to

10/14/2026

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 9, 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
89.81***
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
89.81***
γ

leverage

Additional response to negative shocks

0.1457
4.92***

Persistence:

0.963

Half-life:

18 days