First Chicago NBD Corp.'s stock rating was lowered Thursday by two analysts who said the shares were due to cool off after surging 19% in a month.

Analyst James P. Benson of Ryan Beck & Co. reduced his rating on the midwestern giant to "buy" from "strong buy," telling brokers in a morning conference call that "First Chicago has had a good year this month." Joseph Duwan of Keefe, Bruyette & Woods Inc. followed suit, cutting First Chicago's stock rating to "accumulate" from "buy" and noting the stock was approaching Keefe's target price of $62.

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