V-Lab
Alphabet Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
34.35%
decreased by 0.83%
1 Week
34.22%
decreased by 0.96%
1 Month
33.76%
decreased by 1.42%
Analysis last updated: Friday, August 21, 2026 at 09:50 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 19, 2004 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 129% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0909 | 9.55*** |
α ARCH Response to squared shocks | 0.0307 | 12.67*** |
β GARCH Volatility persistence | 0.9262 | 211.50*** |
γ leverage Additional response to negative shocks | 0.0395 | 6.74*** |
Persistence:
0.977
Half-life:
29 days
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