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V-Lab

Indonesia Prima Prop (Pt) GJR-GARCH Volatility Analysis

High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful

Volatility prediction for Tuesday, July 21st, 2026

1 Day

108.07%

increased by 48.53%

1 Week

108.47%

increased by 48.93%

1 Month

110.07%

increased by 50.53%

Analysis last updated: Tuesday, July 21, 2026 at 08:09 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Indonesia Prima Prop (Pt) GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 31, 1992 to Jul 17, 2026

Model Insight

Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1734
8.65***
α

ARCH

Response to squared shocks

0.0944
9.61***
β

GARCH

Volatility persistence

0.8791
168.57***
γ

leverage

Additional response to negative shocks

0.0530
1.32

Persistence:

1.000

Half-life:

-