V-Lab
Neogen Corp GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
52.37%
decreased by 2.84%
1 Week
52.40%
decreased by 2.81%
1 Month
52.51%
decreased by 2.70%
Analysis last updated: Tuesday, August 25, 2026 at 09:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
With persistence 0.992, volatility shocks have a half-life of 83 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 3.36 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 11.5935 | 12.23*** |
α ARCH Response to squared shocks | 0.0544 | 71.18*** |
β GARCH Volatility persistence | 0.9916 | 1,315.17*** |
ν DF Student-t tail thickness | 3.3647 | 80.51*** |
Persistence:
0.992
Half-life:
83 days
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