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V-Lab

ProShares Ultra VIX Short-Term Futures ETF Asy. MEM Volatility Analysis

Volatility prediction for Monday, July 20th, 2026

1 Day

79.33%

increased by 3.05%

1 Week

86.35%

increased by 10.07%

1 Month

100.10%

increased by 23.82%

Analysis last updated: Friday, July 17, 2026 at 09:47 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of ProShares Ultra VIX Short-Term Futures ETF AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 8, 2011 to Jul 17, 2026
Boundary Parameters

Model Insight

This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 74% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.

μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
32.32***
α

ARCH

Response to squared shocks

0.4537
32.60***
β

GARCH

Volatility persistence

0.5447
69.91***
γ

leverage

Additional response to negative shocks

-0.1933
-8.65***

Persistence:

0.902

Half-life:

7 days