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Tokyo Stock Exchange Tokyo Stock Price Index TOPIX Asy. MEM Volatility Analysis

Volatility prediction for Friday, October 16th, 2026

1 Day

20.34%

increased by 5.75%

1 Week

20.35%

increased by 5.76%

1 Month

20.38%

increased by 5.79%

Analysis last updated: Friday, October 16, 2026 at 11:49 PM UTC

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Date Range:

from

10/15/2024

to

10/15/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Tokyo Stock Exchange Tokyo Stock Price Index TOPIX AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 4, 1990 to Oct 8, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 95% more than equivalent positive returns.

μ

AMEM Model

Tap to view equation

Leverage: Negative returns increase volatility 95% more than positive returns
ParamValuet-stat
ωconst0.0636
9.66***
αARCH0.1482
8.79***
βGARCH0.7428
61.08***
γleverage0.1413
4.39***

0.962

Persistence

18d

Half-life
μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0636
9.66***
α

ARCH

Response to squared shocks

0.1482
8.79***
β

GARCH

Volatility persistence

0.7428
61.08***
γ

leverage

Additional response to negative shocks

0.1413
4.39***

Persistence:

0.962

Half-life:

18 days