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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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of ProShares Ultra VIX Short-Term Futures ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 8, 2011 to Aug 14, 2026
Boundary 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

ParameterValuet-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