V-Lab
ProShares UltraPro Short QQQ GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
75.79%
increased by 0.04%
1 Week
75.72%
decreased by 0.03%
1 Month
75.47%
decreased by 0.28%
Analysis last updated: Friday, July 24, 2026 at 09:46 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 11, 2010 to Jul 24, 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.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4190 | 18.61*** |
α ARCH Response to squared shocks | 0.2132 | 22.19*** |
β GARCH Volatility persistence | 0.8709 | 246.64*** |
γ leverage Additional response to negative shocks | -0.2068 | -20.00*** |
Persistence:
0.981
Half-life:
36 days
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