V-Lab
HSI Volatility Index EGARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
69.04%
increased by 4.71%
1 Week
70.98%
increased by 6.65%
1 Month
76.62%
increased by 12.29%
Analysis last updated: Saturday, September 12, 2026 at 12:48 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 16, 2010 to Sep 10, 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
EGARCH Model
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Inverse leverage: volatility responds almost entirely to positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2108 | 1.59 |
| αARCH | 0.1233 | 3.20*** |
| βGARCH | 0.9382 | 37.85*** |
| γleverage | 0.1303 | 2.71*** |
0.938
Persistence11d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2108 | 1.59 |
α ARCH Response to squared shocks | 0.1233 | 3.20*** |
β GARCH Volatility persistence | 0.9382 | 37.85*** |
γ leverage Additional response to negative shocks | 0.1303 | 2.71*** |
Persistence:
0.938
Half-life:
11 days
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