Skip to main content
V-Lab

Ishares S&P 500 EX S&P 1 ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 17th, 2026

1 Day

12.32%

decreased by 0.33%

1 Week

12.61%

decreased by 0.04%

1 Month

12.67%

increased by 0.02%

Analysis last updated: Saturday, August 15, 2026 at 02:35 AM UTC

Date Range:

from

to

6M ·

1Y ·

All

graph of Ishares S&P 500 EX S&P 1 ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 9, 2025 to Aug 14, 2026
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.6385
25.79***
α

ARCH

Response to squared shocks

0.0537
0.71
β

GARCH

Volatility persistence

0.0000
0.00
ν

DF

Student-t tail thickness

16.0500
0.05

Persistence:

0.000

Half-life:

-