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V-Lab

Ishares Core Sp500 IDX (Cad) GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, July 28th, 2026

1 Day

11.53%

decreased by 0.85%

1 Week

11.80%

decreased by 0.58%

1 Month

12.73%

increased by 0.35%

Analysis last updated: Tuesday, July 28, 2026 at 09:26 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Ishares Core Sp500 IDX (Cad) GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 29, 2001 to Jul 24, 2026

Model Insight

Volatility shocks decay with a half-life of 55 trading days, meaning a shock loses half its impact after approximately 55 days. Returns follow a Student-t distribution with v = 7.24 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.5204
5.89***
α

ARCH

Response to squared shocks

0.1071
35.05***
β

GARCH

Volatility persistence

0.9875
429.91***
ν

DF

Student-t tail thickness

7.2439
7.26***

Persistence:

0.988

Half-life:

55 days