V-Lab
HSI Volatility Index EGARCH Volatility Analysis
Volatility prediction for Friday, September 25th, 2026
1 Day
63.35%
decreased by 2.09%
1 Week
65.76%
increased by 0.32%
1 Month
73.00%
increased by 7.56%
Analysis last updated: Friday, September 25, 2026 at 09:00 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 16, 2010 to Sep 24, 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 | 0.2077 | 1.58 |
| αARCH | 0.1234 | 3.20*** |
| βGARCH | 0.9391 | 38.08*** |
| γleverage | 0.1290 | 2.67*** |
0.939
Persistence11d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2077 | 1.58 |
α ARCH Response to squared shocks | 0.1234 | 3.20*** |
β GARCH Volatility persistence | 0.9391 | 38.08*** |
γ leverage Additional response to negative shocks | 0.1290 | 2.67*** |
Persistence:
0.939
Half-life:
11 days
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