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Nikkei Stock Average Volatility Index EGARCH Volatility Analysis

Volatility prediction for Monday, September 7th, 2026

1 Day

144.97%

decreased by 4.40%

1 Week

141.38%

decreased by 7.99%

1 Month

131.07%

decreased by 18.30%

Analysis last updated: Saturday, September 12, 2026 at 12:48 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Nikkei Stock Average Volatility Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1990 to Sep 4, 2026

Model Insight

This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.

σ

EGARCH Model

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Inverse leverage: volatility responds almost entirely to positive returns
ParamValuet-stat
ωconst0.1510
3.23***
αARCH0.1485
5.00***
βGARCH0.9599
93.47***
γleverage0.1024
3.59***

0.960

Persistence

17d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1510
3.23***
α

ARCH

Response to squared shocks

0.1485
5.00***
β

GARCH

Volatility persistence

0.9599
93.47***
γ

leverage

Additional response to negative shocks

0.1024
3.59***

Persistence:

0.960

Half-life:

17 days