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V-Lab

Pngs Reva Diamond Jewellery Ltd AGARCH Volatility Analysis

Volatility prediction for Monday, October 19th, 2026

1 Day

57.00%

increased by 8.46%

1 Week

57.09%

increased by 8.55%

1 Month

57.13%

increased by 8.59%

Analysis last updated: Saturday, October 17, 2026 at 10:41 PM UTC

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Date Range:

from

10/16/2024

to

10/16/2026

6M ·

All

graph of Pngs Reva Diamond Jewellery Ltd AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 4, 2026 to Oct 16, 2026

Model Insight

The news-impact curve is shifted (γ = -2.15) so that positive returns raise next-day volatility more than negative returns of the same size. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and rare among risky assets.

σ

AGARCH Model

Tap to view equation

Asymmetry: positive returns raise volatility more
ParamValuet-stat
ωconst5.7357
3.72***
αARCH0.3361
2.10**
βGARCH0.1009
1.18
γleverage-2.1535
-2.11**

0.437

Persistence

1d

Half-life
σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.7357
3.72***
α

ARCH

Response to squared shocks

0.3361
2.10**
β

GARCH

Volatility persistence

0.1009
1.18
γ

leverage

Additional response to negative shocks

-2.1535
-2.11**

Persistence:

0.437

Half-life:

1 days