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V-Lab

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

Volatility prediction for Tuesday, September 8th, 2026

1 Day

12.27%

decreased by 0.32%

1 Week

12.49%

decreased by 0.10%

1 Month

12.54%

decreased by 0.05%

Analysis last updated: Saturday, September 5, 2026 at 02:28 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 Sep 4, 2026
𝑓

GAS-GARCH-T Model

Tap to view equation

ParamValuet-stat
ωconst0.6250
6.22***
αARCH0.0389
0.13
βGARCH0.0000
0.00
νDF16.9174
0.01

0.000

Persistence

-

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.6250
6.22***
α

ARCH

Response to squared shocks

0.0389
0.13
β

GARCH

Volatility persistence

0.0000
0.00
ν

DF

Student-t tail thickness

16.9174
0.01

Persistence:

0.000

Half-life:

-