V-Lab
ProShares Ultra VIX Short-Term Futures ETF GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 17th, 2026
1 Day
70.62%
decreased by 0.83%
1 Week
81.07%
increased by 9.62%
1 Month
102.12%
increased by 30.67%
Analysis last updated: Friday, August 14, 2026 at 09:35 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 8, 2011 to Aug 14, 2026Boundary Parameters
Model 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 | 5.0000 | 19.76*** |
α ARCH Response to squared shocks | 0.3577 | 19.22*** |
β GARCH Volatility persistence | 0.7223 | 107.96*** |
γ leverage Additional response to negative shocks | -0.3210 | -15.98*** |
Persistence:
0.920
Half-life:
8 days
Other ProShares Ultra VIX Short-Term Futures ETF Analyses
Other GJR-GARCH Analyses on ETFs