ETFs: Is Today's Wall Street Trend Destined to Disappoint?

Exchange-traded funds have never been more popular. And no wonder: They're passively managed, which makes them as cheap as indexed mutual funds, but they trade all day long, like stocks. And they tend to be more tax advantaged than mutual funds, given that ETFs very rarely kick off capital gains distributions.

But Wall Street greed might make ETFs the next good investment vehicle to go bad. And several high-powered advisors and analysts see the table being set for investor disappointment.