V-Lab
Pngs Reva Diamond Jewellery Ltd MEM Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
75.47%
decreased by 4.33%
1 Week
76.78%
decreased by 3.02%
1 Month
79.71%
decreased by 0.09%
Analysis last updated: Friday, September 11, 2026 at 07:50 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 4, 2026 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days.
μ
MEM Model
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Shock decay: Shocks decay with a 7-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.5048 | 0.56 |
| αARCH | 0.1598 | 0.73 |
| βGARCH | 0.7487 | 4.56*** |
0.908
Persistence7d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.5048 | 0.56 |
α ARCH Response to squared shocks | 0.1598 | 0.73 |
β GARCH Volatility persistence | 0.7487 | 4.56*** |
Persistence:
0.908
Half-life:
7 days
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