The head of mutual funds for Bank One, one of four mutual fund companies named in New York State Attorney General Eliot Spitzer’s Sept. 3 fund trading complaint, has lost its head of mutual funds, Reuters reports.

Mark Beeson, head of the firm’s fund division, resigned Wednesday, as the bank looks into whether it allowed market timing and/or late trading in its funds. John AbuNassar, who ran the bank’s institutional asset management division, also has left.

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