Which ETFs do you own?

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I see on this site that many people are interested in investing and stocks and such. I wonder, how many of you own ETFs? (Exchange Traded Funds) If you don't, they are very cool little investing tools that act like stocks but are really in fact mutual funds from all over the world. If you do, which one/s do you own? I am currently looking into a Brazilian ETF that has an amazing track record.