V-Lab
HSI Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
65.71%
decreased by 1.01%
1 Week
67.62%
increased by 0.90%
1 Month
72.72%
increased by 6.00%
Analysis last updated: Friday, July 24, 2026 at 11:21 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 16, 2010 to Nov 19, 2021Model 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 | 1.5007 | 10.51*** |
α ARCH Response to squared shocks | 0.1194 | 15.79*** |
β GARCH Volatility persistence | 0.8813 | 140.49*** |
γ leverage Additional response to negative shocks | -0.1139 | -11.70*** |
Persistence:
0.944
Half-life:
12 days
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