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V-Lab

Korea Securities Dealers Association KOSDAQ Index GJR-GARCH Volatility Analysis

Volatility prediction for Thursday, August 20th, 2026

1 Day

46.43%

decreased by 4.26%

1 Week

45.99%

decreased by 4.70%

1 Month

44.41%

decreased by 6.28%

Analysis last updated: Wednesday, August 19, 2026 at 09:09 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 Aug 14, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 145% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0865
31.46***
α

ARCH

Response to squared shocks

0.1076
22.44***
β

GARCH

Volatility persistence

0.7949
232.57***
γ

leverage

Additional response to negative shocks

0.1555
16.03***

Persistence:

0.980

Half-life:

35 days