A changing of the guard at Citigroup Inc.'s North American branch banking business could signal that the giant company is becoming more willing to grow by acquisition.

Marge Magner, who was named Friday to take the helm after Joseph Plumeri's unexpected announcement that he plans to resign at yearend, said she plans to continue to infuse a sales culture into the operations and suggested she could build Citi's 450-branch network by acquisition. "We would love to be bigger and have more customers in whatever shape and form that might take," she said.

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