V-Lab
Hong Kong Hang Seng Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, October 5th, 2026
1 Day
20.50%
increased by 5.43%
1 Week
20.64%
increased by 5.57%
1 Month
21.12%
increased by 6.05%
Analysis last updated: Friday, October 2, 2026 at 09:08 AM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Oct 2, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 184% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
Leverage: Negative returns increase volatility 184% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0416 | 4.98*** |
| αARCH | 0.0410 | 3.31*** |
| βGARCH | 0.9032 | 96.99*** |
| γleverage | 0.0755 | 3.52*** |
0.982
Persistence38d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0416 | 4.98*** |
α ARCH Response to squared shocks | 0.0410 | 3.31*** |
β GARCH Volatility persistence | 0.9032 | 96.99*** |
γ leverage Additional response to negative shocks | 0.0755 | 3.52*** |
Persistence:
0.982
Half-life:
38 days
Other Hong Kong Hang Seng Index Analyses
Other GJR-GARCH Analyses on Equity Indices