V-Lab
ProShares Ultra VIX Short-Term Futures ETF MF2-GARCH Volatility Analysis
Volatility prediction for Wednesday, September 9th, 2026
1 Day
66.78%
1 Week
73.36%
1 Month
85.84%
Analysis last updated: Tuesday, September 8, 2026 at 11:42 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 8, 2011 to Sep 8, 2026Model Insight
This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.
MF2-GARCH Model
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| Param | Value | t-stat |
|---|---|---|
| mwindow | 51 | |
| αARCH | 0.3715 | 9.90*** |
| βGARCH | 0.7144 | 29.86*** |
| γleverage | -0.3715 | -9.60*** |
| λ₁tau intercept | 0.2348 | 0.74 |
| λ₂forecast adj. | 0.0122 | 1.41 |
| λ₃tau persistence | 0.9832 | 71.12*** |
0.900
Persistence7d
Half-lifeMF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 51 | |
α ARCH Response to squared shocks | 0.3715 | 9.90*** |
β GARCH Volatility persistence | 0.7144 | 29.86*** |
γ leverage Additional response to negative shocks | -0.3715 | -9.60*** |
λ₁ tau intercept Baseline long-term coefficient | 0.2348 | 0.74 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0122 | 1.41 |
λ₃ tau persistence Long-term factor persistence | 0.9832 | 71.12*** |
Persistence:
0.900
Half-life:
7 days
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