V-Lab
Pngs Reva Diamond Jewellery Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
50.74%
decreased by 0.74%
1 Week
54.39%
increased by 2.91%
1 Month
55.54%
increased by 4.06%
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, 2026Model Insight
Volatility shocks decay with a half-life of 1 trading day, meaning a shock loses half its impact after approximately 1 day. Returns follow a Student-t distribution with v = 3.62 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
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Shock decay: Shocks decay with a 1-day half-lifev = 3.62 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 12.3997 | 1.06 |
| αARCH | 0.1359 | 0.31 |
| βGARCH | 0.3425 | 0.67 |
| νDF | 3.6176 | 0.17 |
0.343
Persistence1d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 12.3997 | 1.06 |
α ARCH Response to squared shocks | 0.1359 | 0.31 |
β GARCH Volatility persistence | 0.3425 | 0.67 |
ν DF Student-t tail thickness | 3.6176 | 0.17 |
Persistence:
0.343
Half-life:
1 days
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