V-Lab
Pngs Reva Diamond Jewellery Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
43.27%
increased by 1.93%
1 Week
49.26%
increased by 7.92%
1 Month
52.29%
increased by 10.95%
Analysis last updated: Saturday, September 19, 2026 at 10:35 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 4, 2026 to Sep 18, 2026Boundary Parameters
Model Insight
Volatility shocks decay with a half-life of 1 trading day, meaning a shock loses half its impact after approximately 1 day.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 1-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 2.99*** |
| αARCH | 0.5661 | 1.10 |
| βGARCH | 0.2193 | 1.04 |
| γleverage | -0.4586 | -0.84 |
0.556
Persistence1d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 2.99*** |
α ARCH Response to squared shocks | 0.5661 | 1.10 |
β GARCH Volatility persistence | 0.2193 | 1.04 |
γ leverage Additional response to negative shocks | -0.4586 | -0.84 |
Persistence:
0.556
Half-life:
1 days
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