V-Lab
Pngs Reva Diamond Jewellery Ltd APARCH Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
32.84%
decreased by 0.08%
1 Week
32.65%
decreased by 0.27%
1 Month
32.03%
decreased by 0.89%
Analysis last updated: Wednesday, August 5, 2026 at 07:08 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 4, 2026 to Jul 31, 2026Model Insight
Volatility shocks decay with a half-life of 24 trading days, meaning a shock loses half its impact after approximately 24 days. The volatility power δ = 1.72 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
σ
APARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0800 | 1.11 |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.9720 | 56.82*** |
γ leverage Additional response to negative shocks | -0.9682 | 0.00 |
δ power Transformation power | 1.7165 | 6.69*** |
Persistence:
0.972
Half-life:
24 days
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