Columbia Management announced that PMs Alexander Powers and Stephan Barbaro will retire come January 2013, Morningstar notes.

Powers PMs the $3.1 billion Columbia Diversified Bond with Brian Lavin, Carl Pappo and Michael Zazzarino. Powers also PMs the $1.5 billion Columbia Bond Fund. Upon Powers' retirement, Pappo will become lead PM of the Columbia Bond fund.

Stephen Barbaro currently co-PMs the $1.6 billion Columbia Small Cap Value with Jeremy Javidi and John Barrett.  

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