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V-Lab

iShares Core S&P U.S. Growth ETF GJR-GARCH Volatility Analysis

Volatility prediction for Thursday, August 27th, 2026

1 Day

14.18%

decreased by 0.50%

1 Week

14.35%

decreased by 0.33%

1 Month

14.92%

increased by 0.24%

Analysis last updated: Wednesday, August 26, 2026 at 10:17 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of iShares Core S&P U.S. Growth ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 28, 2000 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 40 trading days, meaning a shock loses half its impact after approximately 40 days.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0230
15.62***
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.9053
304.31***
γ

leverage

Additional response to negative shocks

0.1554
27.15***

Persistence:

0.983

Half-life:

40 days