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Pngs Reva Diamond Jewellery Ltd APARCH Volatility Analysis

Volatility prediction for Friday, October 16th, 2026

1 Day

52.34%

decreased by 4.22%

1 Week

53.65%

decreased by 2.91%

1 Month

55.19%

decreased by 1.37%

Analysis last updated: Friday, October 16, 2026 at 07:37 PM UTC

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Date Range:

from

10/15/2024

to

10/15/2026

6M ·

All

graph of Pngs Reva Diamond Jewellery Ltd APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 4, 2026 to Oct 9, 2026

Model Insight

Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days. The volatility power δ = 1.18 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

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Shock decay: Shocks decay with a 3-day half-lifeδ = 1.18 · sub-quadratic power
ParamValuet-stat
ωconst1.0000
0.50
αARCH0.2386
2.26**
βGARCH0.5729
2.58***
γleverage-0.6147
-1.54
δpower1.1843
0.87

0.775

Persistence

3d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0000
0.50
α

ARCH

Response to squared shocks

0.2386
2.26**
β

GARCH

Volatility persistence

0.5729
2.58***
γ

leverage

Additional response to negative shocks

-0.6147
-1.54
δ

power

Transformation power

1.1843
0.87

Persistence:

0.775

Half-life:

3 days