Skip to main content
V-Lab

Proshares S&P 500 EX-Technology ETF AGARCH Volatility Analysis

Volatility prediction for Monday, August 10th, 2026

1 Day

11.07%

decreased by 1.07%

1 Week

11.63%

decreased by 0.51%

1 Month

13.03%

increased by 0.89%

Analysis last updated: Saturday, August 8, 2026 at 02:27 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Proshares S&P 500 EX-Technology ETF AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 24, 2015 to Aug 7, 2026

Model Insight

The news-impact curve is shifted (γ = 0.67) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.

σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0000
0.00
α

ARCH

Response to squared shocks

0.1287
19.71***
β

GARCH

Volatility persistence

0.8087
105.54***
γ

leverage

Additional response to negative shocks

0.6678
16.26***

Persistence:

0.937

Half-life:

11 days