Pngs Reva Diamond Jewellery Ltd EGARCH Volatility Analysis
Volatility prediction for Friday, October 16th, 2026
1 Day
47.56%
decreased by 0.65%
1 Week
49.53%
increased by 1.32%
1 Month
51.08%
increased by 2.87%
Analysis last updated: Friday, October 16, 2026 at 07:37 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 4, 2026 to Oct 9, 2026Model Insight
Volatility shocks decay with a half-life of 2 trading days, meaning a shock loses half its impact after approximately 2 days.
σ
EGARCH Model
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Shock decay: Shocks decay with a 2-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.7994 | 1.86* |
| αARCH | 0.4245 | 2.47** |
| βGARCH | 0.6612 | 4.04*** |
| γleverage | 0.2663 | 1.46 |
0.661
Persistence2d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.7994 | 1.86* |
α ARCH Response to squared shocks | 0.4245 | 2.47** |
β GARCH Volatility persistence | 0.6612 | 4.04*** |
γ leverage Additional response to negative shocks | 0.2663 | 1.46 |
Persistence:
0.661
Half-life:
2 days
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