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V-Lab
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

Date Range:

from

to

6M ·

All

graph of Pngs Reva Diamond Jewellery Ltd GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 4, 2026 to Sep 18, 2026
Boundary 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

Tap to view equation

Shock decay: Shocks decay with a 1-day half-life
ParamValuet-stat
ωconst5.0000
2.99***
αARCH0.5661
1.10
βGARCH0.2193
1.04
γleverage-0.4586
-0.84

0.556

Persistence

1d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-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