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V-Lab

State Street Energy Select Sector SPDR ETF MEM Volatility Analysis

Volatility prediction for Wednesday, July 22nd, 2026

1 Day

19.24%

decreased by 0.94%

1 Week

19.64%

decreased by 0.54%

1 Month

21.02%

increased by 0.84%

Analysis last updated: Tuesday, July 21, 2026 at 09:54 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of State Street Energy Select Sector SPDR ETF MEM

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

Volatility shocks decay with a half-life of 50 trading days, meaning a shock loses half its impact after approximately 50 days.

μ

MEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0512
8.08***
α

ARCH

Response to squared shocks

0.2025
44.42***
β

GARCH

Volatility persistence

0.7838
205.30***

Persistence:

0.986

Half-life:

50 days