Single-stock ETFs are 'way too risky for 99% of investors,' advisor says. What to know before adding one to your portfolio - CNBC

If you're chasing quick returns, single-stock exchange-traded funds allow leveraged bets on individual assets. Here's what to know before buying.

Most investors think of exchange-traded funds as a simple way to buy a diversified basket of individual stocks tracking an index or with exposure to a particular theme. But now there are also so-cal… [+3129 chars]

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