V-Lab
Vietnam Airlines Jsc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
31.08%
increased by 0.26%
1 Week
33.39%
increased by 2.57%
1 Month
37.25%
increased by 6.43%
Analysis last updated: Sunday, August 23, 2026 at 03:31 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 7, 2019 to Aug 21, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 47% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.8491 | 13.34*** |
α ARCH Response to squared shocks | 0.1215 | 10.65*** |
β GARCH Volatility persistence | 0.7163 | 49.30*** |
γ leverage Additional response to negative shocks | 0.0576 | 2.37** |
Persistence:
0.867
Half-life:
5 days
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