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V-Lab

ProShares UltraPro Short QQQ Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

67.22%

decreased by 1.43%

1 Week

67.50%

decreased by 1.15%

1 Month

68.40%

decreased by 0.25%

Analysis last updated: Friday, July 24, 2026 at 09:48 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of ProShares UltraPro Short QQQ S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 11, 2010 to Jul 24, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 20 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0876
7.03***
α

ARCH

Response to squared shocks

0.1215
7.57***
β

GARCH

Volatility persistence

0.8438
45.48***
γi Spline Coefficients
K=2
γ10.0166
2.46**
γ2-0.0226
-2.66***

Persistence:

0.965

Half-life:

20 days