Ultragenyx Pharmaceutical Inc MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, October 20th, 2026
1 Day
68.58%
decreased by 0.88%
1 Week
71.01%
increased by 1.55%
1 Month
74.31%
increased by 4.85%
Analysis last updated: Monday, October 19, 2026 at 09:27 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 31, 2014 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 2 trading days, meaning a shock loses half its impact after approximately 2 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 2-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 121 | |
| αARCH | 0.0382 | 0.73 |
| βGARCH | 0.6339 | 7.73*** |
| γleverage | 0.0970 | 1.73* |
| λ₁tau intercept | 0.0785 | 0.23 |
| λ₂forecast adj. | 0.0098 | 0.70 |
| λ₃tau persistence | 0.9852 | 26.28*** |
0.721
Persistence2d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 121 | |
α ARCH Response to squared shocks | 0.0382 | 0.73 |
β GARCH Volatility persistence | 0.6339 | 7.73*** |
γ leverage Additional response to negative shocks | 0.0970 | 1.73* |
λ₁ tau intercept Baseline long-term coefficient | 0.0785 | 0.23 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0098 | 0.70 |
λ₃ tau persistence Long-term factor persistence | 0.9852 | 26.28*** |
Persistence:
0.721
Half-life:
2 days
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