V-Lab
HSI Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
65.11%
decreased by 0.89%
1 Week
67.94%
increased by 1.94%
1 Month
74.29%
increased by 8.29%
Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 16, 2010 to Aug 27, 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
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Inverse leverage: volatility responds almost entirely to positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.2068 | 3.02*** |
| αARCH | 0.1414 | 4.25*** |
| βGARCH | 0.8455 | 33.38*** |
| γleverage | -0.1396 | -3.53*** |
0.917
Persistence8d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.2068 | 3.02*** |
α ARCH Response to squared shocks | 0.1414 | 4.25*** |
β GARCH Volatility persistence | 0.8455 | 33.38*** |
γ leverage Additional response to negative shocks | -0.1396 | -3.53*** |
Persistence:
0.917
Half-life:
8 days
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