Exchange-traded funds offer a convenient way to invest in sectors or niches that interest you. If you expect the oil and gas industry to thrive due to our planet's growing demand for energy, the SPDR S&P Oil & Gas Exploration and Production ETF
ETFs often sport lower expense ratios than their mutual fund cousins. This oil and gas ETF's expense ratio -- its annual fee -- is a low 0.35%.
This ETF has performed very well, trouncing the market over the past three and five years, on average. 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.
What's in it?
Several of this ETF's components made strong contributions to its performance so far this year. Brigham Exploration
Other companies haven't added as much to the ETF's returns in 2011 but could have an effect in the years to come. Northern Oil and Gas
The big picture
Demand for oil and gas 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.
Longtime Fool contributor Selena Maranjian holds no position in any company mentioned. Click here to see her holdings and a short bio. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.