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V-Lab

Korea Securities Dealers Association KOSDAQ Index GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 22nd, 2026

1 Day

20.21%

decreased by 0.89%

1 Week

20.86%

decreased by 0.24%

1 Month

23.00%

increased by 1.90%

Analysis last updated: Monday, September 21, 2026 at 09:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Korea Securities Dealers Association KOSDAQ Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1997 to Sep 18, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 144% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 144% more than positive returns
ParamValuet-stat
ωconst0.0869
7.91***
αARCH0.1077
5.61***
βGARCH0.7946
58.19***
γleverage0.1552
4.00***

0.980

Persistence

34d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0869
7.91***
α

ARCH

Response to squared shocks

0.1077
5.61***
β

GARCH

Volatility persistence

0.7946
58.19***
γ

leverage

Additional response to negative shocks

0.1552
4.00***

Persistence:

0.980

Half-life:

34 days