V-Lab
Cyanotech Corp GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
178.79%
decreased by 0.50%
1 Week
178.65%
decreased by 0.64%
1 Month
178.08%
decreased by 1.21%
Analysis last updated: Wednesday, August 19, 2026 at 09:08 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 22, 1991 to Aug 14, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 397 trading days (~1.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 172% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1192 | 5.71*** |
α ARCH Response to squared shocks | 0.0152 | 9.51*** |
β GARCH Volatility persistence | 0.9699 | 824.05*** |
γ leverage Additional response to negative shocks | 0.0262 | 5.66*** |
Persistence:
0.998
Half-life:
397 days
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