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V-Lab

ProShares UltraPro S&P 500 GJR-GARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

42.60%

decreased by 3.01%

1 Week

43.49%

decreased by 2.12%

1 Month

45.82%

increased by 0.21%

Analysis last updated: Friday, July 24, 2026 at 10:51 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of ProShares UltraPro S&P 500 GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jun 25, 2009 to Jul 24, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.6188
6.10***
α

ARCH

Response to squared shocks

0.0368
1.69*
β

GARCH

Volatility persistence

0.7974
62.52***
γ

leverage

Additional response to negative shocks

0.2051
4.71***

Persistence:

0.937

Half-life:

11 days