V-Lab
Hong Kong Hang Seng Index Asy. Power MEM Volatility Analysis
Volatility prediction for Tuesday, August 11th, 2026
1 Day
17.37%
decreased by 0.82%
1 Week
16.81%
decreased by 1.38%
1 Month
15.04%
decreased by 3.15%
Analysis last updated: Monday, August 10, 2026 at 09:11 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 7, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 25% more than equivalent positive returns. The volatility power δ = 0.87 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
μ
APMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0193 | 28.94*** |
α ARCH Response to squared shocks | 0.1445 | 53.83*** |
β GARCH Volatility persistence | 0.8527 | 324.45*** |
γ leverage Additional response to negative shocks | 0.1265 | 18.21*** |
δ power Transformation power | 0.8718 | 29.08*** |
Persistence:
0.967
Half-life:
21 days
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