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V-Lab

Korea Stock Exchange KOSPI 200 Index EGARCH Volatility Analysis

Volatility prediction for Friday, August 7th, 2026

1 Day

99.46%

increased by 1.83%

1 Week

98.33%

increased by 0.70%

1 Month

94.21%

decreased by 3.42%

Analysis last updated: Friday, August 7, 2026 at 08:36 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Korea Stock Exchange KOSPI 200 Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1990 to Jul 16, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 101 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 69% more than positive returns

σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0136
16.21***
α

ARCH

Response to squared shocks

0.1477
47.05***
β

GARCH

Volatility persistence

0.9932
2,131.24***
γ

leverage

Additional response to negative shocks

-0.0379
-13.14***

Persistence:

0.993

Half-life:

101 days