ETFs specialize in giving investors diversified exposure to a specific corner of the market, like biotech. These pooled vehicles invest in numerous stocks, bonds and commodities — not just one.

As an added bonus, ETFs are cheap. Or at least cheaper than most mutual funds. That’s partially because most ETFs are index funds, meaning they track a basket of assets that’s already been created by highly-paid professionals.

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Curated from Biotech – The 5 hottest ETFs in the world – CNNMoney