Marshall & Ilsley Corp.'s 401(k) record-keeping division said it will roll out 24-hour-a-day account service to all its plan participants this year.

M&I Trust and Investment Management, a division of the $21.2 billion- asset Milwaukee banking company, plans to offer both Internet and call- center service to its 750 plan participants by the end of June, said Gary Bakker, a bank vice president and head of M&I's commercial trust division.

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