V-Lab
Zhejiang E-P Equipment Co APARCH Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
26.73%
decreased by 1.41%
1 Week
30.99%
increased by 2.85%
1 Month
34.88%
increased by 6.74%
Analysis last updated: Wednesday, August 19, 2026 at 06:05 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 24, 2024 to Aug 14, 2026Model Insight
Volatility shocks decay with a half-life of 2 trading days, meaning a shock loses half its impact after approximately 2 days. The volatility power δ = 1.58 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
σ
APARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0000 | 3.35*** |
α ARCH Response to squared shocks | 0.2829 | 11.21*** |
β GARCH Volatility persistence | 0.4819 | 11.07*** |
γ leverage Additional response to negative shocks | 0.0655 | 1.53 |
δ power Transformation power | 1.5772 | 5.23*** |
Persistence:
0.730
Half-life:
2 days
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