(Bloomberg) -- Tired of your stock manager? No problem, buy an ETF that tracks the S&P 500. But if you're sick of your junk-bond manager, good luck finding an ETF that can beat him.

Since 2007, more than 80% of active high-yield managers tracked by Bloomberg posted better returns than either BlackRock's $15.9 billion iShares iBoxx $ High Yield Corporate Bond ETF or State Street's $11.3 billion SPDR Barclays High Yield Bond ETF, the two biggest of their kind. In stocks, fewer than 25% of managers beat indexes over the same time frame.

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