V-Lab
Jakarta Stock Exchange LQ45 Index GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, August 20th, 2026
1 Day
18.39%
decreased by 0.57%
1 Week
18.82%
decreased by 0.14%
1 Month
20.34%
increased by 1.38%
Analysis last updated: Wednesday, August 19, 2026 at 10:02 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 24, 1997 to Aug 14, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 113% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0460 | 20.17*** |
α ARCH Response to squared shocks | 0.0745 | 18.96*** |
β GARCH Volatility persistence | 0.8729 | 335.75*** |
γ leverage Additional response to negative shocks | 0.0842 | 11.35*** |
Persistence:
0.990
Half-life:
66 days
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