NATION

Mike Madden, former investment banking chief for Kidder, Peabody & Co., was named a senior managing director in investment banking at Shearson Lehman Hutton Holdings Inc. Madden resigned from Kidder in early February, along with two other senior investment bankers, less than two weeks after General Electric Co. asserted full control over Kidder, of which it owns 80%. General Electric put a young GE executive, Michael Carpenter, in charge of the securities firm. Peter A. Cohn, chairman and chief executive of Shearson, which is a subsidiary of American Express Co., said Madden will run a major area of investment banking but will not be involved in mergers and acquisitions.