Fidelity Investments, the nation’s biggest mutual fund complex, said on Monday it has reshuffled its portfolio management team for three of its Select funds.

The Boston-based firm wrote on its Web site that Heather Lawerence succeeded Peter Hirsch as manager of the $476 million Fidelity Select Banking Portfolio. Previously, Lawerence ran the $40 million Fidelity Select Transportation fund. Christopher Bartel took over the reins for Alex Sacerdote at the Fidelity Select Defense and Aerospace fund, a no-load offering with $336 million in assets under management.

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