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Deutsche Telekom AG GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

29.79%

increased by 6.53%

1 Week

29.74%

increased by 6.48%

1 Month

29.57%

increased by 6.31%

Analysis last updated: Saturday, September 19, 2026 at 08:37 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Deutsche Telekom AG GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 15, 1996 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 49 trading days, meaning a shock loses half its impact after approximately 49 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 49-day half-life
ParamValuet-stat
ωconst0.0435
3.89***
αARCH0.0637
5.60***
βGARCH0.9131
82.42***
γleverage0.0185
1.01

0.986

Persistence

49d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0435
3.89***
α

ARCH

Response to squared shocks

0.0637
5.60***
β

GARCH

Volatility persistence

0.9131
82.42***
γ

leverage

Additional response to negative shocks

0.0185
1.01

Persistence:

0.986

Half-life:

49 days