V-Lab
Alphabet Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
43.63%
decreased by 1.35%
1 Week
43.16%
decreased by 1.82%
1 Month
41.51%
decreased by 3.47%
Analysis last updated: Friday, July 24, 2026 at 09:44 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 19, 2004 to Jul 24, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 132% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0873 | 9.45*** |
α ARCH Response to squared shocks | 0.0295 | 12.56*** |
β GARCH Volatility persistence | 0.9286 | 219.22*** |
γ leverage Additional response to negative shocks | 0.0389 | 6.82*** |
Persistence:
0.978
Half-life:
31 days
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