Pngs Reva Diamond Jewellery Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Monday, October 19th, 2026
1 Day
85.55%
increased by 31.02%
1 Week
76.67%
increased by 22.14%
1 Month
64.47%
increased by 9.94%
Analysis last updated: Saturday, October 17, 2026 at 10:41 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 4, 2026 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 3-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.9545 | 1.88* |
| αARCH | 0.4663 | 1.58 |
| βGARCH | 0.5078 | 3.57*** |
| γleverage | -0.3979 | -1.21 |
0.775
Persistence3d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.9545 | 1.88* |
α ARCH Response to squared shocks | 0.4663 | 1.58 |
β GARCH Volatility persistence | 0.5078 | 3.57*** |
γ leverage Additional response to negative shocks | -0.3979 | -1.21 |
Persistence:
0.775
Half-life:
3 days
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