V-Lab
KOSPI 200 Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, August 21st, 2026
1 Day
73.12%
decreased by 3.38%
1 Week
74.88%
decreased by 1.62%
1 Month
78.70%
increased by 2.20%
Analysis last updated: Friday, August 21, 2026 at 08:21 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 2003 to Jul 16, 2026Model 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
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.5743 | 15.35*** |
α ARCH Response to squared shocks | 0.2053 | 15.36*** |
β GARCH Volatility persistence | 0.8028 | 101.95*** |
γ leverage Additional response to negative shocks | -0.2053 | -13.34*** |
Persistence:
0.905
Half-life:
7 days
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