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Korea Stock Exchange KOSPI Index EGARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

39.39%

increased by 0.29%

1 Week

39.18%

increased by 0.08%

1 Month

38.43%

decreased by 0.67%

Analysis last updated: Friday, September 11, 2026 at 09:11 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Korea Stock Exchange KOSPI Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 11, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 67% more than equivalent positive returns.

σ

EGARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 67% more than positive returns
ParamValuet-stat
ωconst0.0153
4.20***
αARCH0.1864
12.81***
βGARCH0.9886
442.53***
γleverage-0.0470
-3.57***

0.989

Persistence

61d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0153
4.20***
α

ARCH

Response to squared shocks

0.1864
12.81***
β

GARCH

Volatility persistence

0.9886
442.53***
γ

leverage

Additional response to negative shocks

-0.0470
-3.57***

Persistence:

0.989

Half-life:

61 days