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V-Lab
V-Lab

Planetel Spa GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 15th, 2026

1 Day

26.82%

decreased by 0.26%

1 Week

28.86%

increased by 1.78%

1 Month

31.89%

increased by 4.81%

Analysis last updated: Wednesday, September 16, 2026 at 05:48 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

All

graph of Planetel Spa GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 15, 2021 to Sep 14, 2026

Model Insight

Volatility shocks decay with a half-life of 4 trading days, meaning a shock loses half its impact after approximately 4 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 4-day half-life
ParamValuet-stat
ωconst0.7170
3.13***
αARCH0.1703
2.65***
βGARCH0.6665
9.40***
γleverage0.0092
0.08

0.841

Persistence

4d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.7170
3.13***
α

ARCH

Response to squared shocks

0.1703
2.65***
β

GARCH

Volatility persistence

0.6665
9.40***
γ

leverage

Additional response to negative shocks

0.0092
0.08

Persistence:

0.841

Half-life:

4 days