Charles Schwab & Co., in the midst of a search for a chief marketing officer, said its senior advertising executive has resigned effective at the end of the month. JACK CALHOUN
, senior vice
president of advertising and brand management, joined Schwab in 2000 from WPP Group's Y&R Advertising, San Francisco, where he had been general manager. Schwab Vice President of Advertising Peter
succeeds Calhoun on an interim basis.