Level 0 ETF basics · Part 10/14

Sector ETFs: a single industry in one fund

A sector ETF holds only companies from one industry instead of the whole market. The opportunities and risks of that industry pass through to the fund unfiltered.

Bars of sector weights in the MSCI World, next to a single bar for a sector ETF with 100 percent in one sector
On the left, sector weights from the holdings list of an MSCI World ETF (iShares Core MSCI World, as of September 15, 2026): (1) IT 29.9 %, (2) financials 16.5 %, (3) industrials 10.9 %, (4) health care 9.2 %, (5) consumer discretionary 8.6 %, (6) communication services 8.4 %, then the other five sectors combined 16.4 %. On the right, (7) a sector ETF: 100 % in a single sector.

An example on Alysly is consumer staples (makers and sellers of everyday goods):

In context

  • In portfolios, sector ETFs usually serve as an addition to a broad core, rarely as the whole portfolio.
  • Concentration in one industry often means considerably larger swings than a world ETF .
  • Large sector names are usually already in the broad index; the ETF comparison shows how much two funds overlap.

Information only, not investment advice.