Skip to main content
V-Lab
V-Lab

iShares Select U.S. REIT ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, October 20th, 2026

1 Day

15.89%

increased by 0.51%

1 Week

16.05%

increased by 0.67%

1 Month

16.59%

increased by 1.21%

Analysis last updated: Tuesday, October 20, 2026 at 02:18 AM UTC

Press Delete or Backspace to remove this series.
Date Range:

from

10/19/2024

to

10/19/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of iShares Select U.S. REIT ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 2, 2001 to Oct 16, 2026

Model Insight

Volatility shocks decay with a half-life of 48 trading days, meaning a shock loses half its impact after approximately 48 days. Returns follow a Student-t distribution with v = 9.35 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 48-day half-lifev = 9.35 · fat tails
ParamValuet-stat
ωconst1.6823
2.49**
αARCH0.0958
8.36***
βGARCH0.9857
164.50***
νDF9.3523
1.34

0.986

Persistence

48d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.6823
2.49**
α

ARCH

Response to squared shocks

0.0958
8.36***
β

GARCH

Volatility persistence

0.9857
164.50***
ν

DF

Student-t tail thickness

9.3523
1.34

Persistence:

0.986

Half-life:

48 days