V-Lab
Deutsche Telekom AG GJR-GARCH Volatility Analysis
Volatility prediction for Friday, August 7th, 2026
1 Day
39.93%
increased by 7.16%
1 Week
39.65%
increased by 6.88%
1 Month
38.61%
increased by 5.84%
Analysis last updated: Friday, August 7, 2026 at 06:42 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 15, 1996 to Jul 31, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 28% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0434 | 15.47*** |
α ARCH Response to squared shocks | 0.0639 | 22.30*** |
β GARCH Volatility persistence | 0.9131 | 327.53*** |
γ leverage Additional response to negative shocks | 0.0179 | 3.88*** |
Persistence:
0.986
Half-life:
49 days
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