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V-Lab

State Street Health Care Select Sector SPDR ETF EGARCH Volatility Analysis

Volatility prediction for Tuesday, July 21st, 2026

1 Day

20.19%

increased by 1.29%

1 Week

20.03%

increased by 1.13%

1 Month

19.50%

increased by 0.60%

Analysis last updated: Monday, July 20, 2026 at 09:52 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of State Street Health Care Select Sector SPDR ETF EGARCH

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 354% more than equivalent positive returns.

σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0069
3.11***
α

ARCH

Response to squared shocks

0.1739
31.20***
β

GARCH

Volatility persistence

0.9679
688.86***
γ

leverage

Additional response to negative shocks

-0.1112
-24.83***

Persistence:

0.968

Half-life:

21 days