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iShares US Real Estate ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

13.07%

increased by 0.76%

1 Week

13.31%

increased by 1.00%

1 Month

14.15%

increased by 1.84%

Analysis last updated: Friday, September 18, 2026 at 10:57 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of iShares US Real Estate ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jun 16, 2000 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 50 trading days, meaning a shock loses half its impact after approximately 50 days. Returns follow a Student-t distribution with v = 9.24 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 50-day half-lifev = 9.24 · fat tails
ParamValuet-stat
ωconst1.5999
2.27**
αARCH0.1017
8.43***
βGARCH0.9862
155.43***
νDF9.2415
1.39

0.986

Persistence

50d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.5999
2.27**
α

ARCH

Response to squared shocks

0.1017
8.43***
β

GARCH

Volatility persistence

0.9862
155.43***
ν

DF

Student-t tail thickness

9.2415
1.39

Persistence:

0.986

Half-life:

50 days