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V-Lab

State Street Technology Select Sector SPDR ETF GJR-GARCH Volatility Analysis

Volatility prediction for Monday, July 20th, 2026

1 Day

33.93%

decreased by 1.04%

1 Week

33.78%

decreased by 1.19%

1 Month

33.21%

decreased by 1.76%

Analysis last updated: Friday, July 17, 2026 at 11:11 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of State Street Technology Select Sector SPDR ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 22, 1998 to Jul 17, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 366% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0290
16.78***
α

ARCH

Response to squared shocks

0.0319
10.01***
β

GARCH

Volatility persistence

0.8988
389.28***
γ

leverage

Additional response to negative shocks

0.1168
18.13***

Persistence:

0.989

Half-life:

64 days