Junk bond funds experienced the second largest outflow this year for the week ending Wednesday, according to AMG Data Services of Arcata, Calif. The $622.2 million in outflows last week is the most since a $649.5 million outflow the week ending March 21.

Having a lot of volatility in junk bond funds is not unusual, due to the way institutional investors typically trade them, according to Avi Nachmany, director of research at Strategic Insight of New York.

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