V-Lab
ParkerVision Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
124.03%
increased by 14.88%
1 Week
124.01%
increased by 14.86%
1 Month
123.92%
increased by 14.77%
Analysis last updated: Saturday, July 25, 2026 at 09:26 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 2, 1993 to Jul 24, 2026Model Insight
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 72% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0544 | 15.28*** |
α ARCH Response to squared shocks | 0.0613 | 12.52*** |
β GARCH Volatility persistence | 0.8992 | 223.56*** |
γ leverage Additional response to negative shocks | 0.0441 | 3.62*** |
Persistence:
0.983
Half-life:
39 days
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