Exchange-traded funds offer a convenient way to invest in sectors or niches that interest you. If you expect industrial companies to thrive over time as global economies keep developing, the iShares Dow Jones U.S. Industrial ETF
ETFs often sport lower expense ratios than their mutual fund cousins. The iShares ETF's expense ratio -- its annual fee -- is a relatively low 0.47%.
This ETF has fared reasonably, outperforming the world market over the past three, five, and 10 years. As with most investments, of course, we can't expect outstanding performances in every quarter or year. Investors with conviction need to wait for their holdings to deliver.
With a low turnover rate of 6%, this fund isn't frantically and frequently rejiggering its holdings, as many funds do.
What's in it?
More than a few industrial companies had strong performances over the past year. General Electric
Meanwhile, railroad company CSX
The big picture
Demand for industry isn't going away anytime soon. A well-chosen ETF can grant you instant diversification across any industry or group of companies -- and make investing in and profiting from it that much easier.
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Longtime Fool contributor Selena Maranjian, whom you can follow on Twitter, owns shares of Emerson Electric, but she holds no other position in any company mentioned. Click here to see her holdings and a short bio. The Motley Fool owns shares of Westport Innovations. Motley Fool newsletter services have recommended buying shares of Emerson Electric, Westport Innovations, and Cummins. The Motley Fool has a disclosure policy.