NEW YORK (AP) ¿ Care Investment Trust Inc., a real estate investment trust that invests in healthcare-related real estate and commercial mortgage debt, said Friday that Salvatore Riso Jr. had become chief executive officer. Riso replaced F. Scott Kellman, who informed the company's board that he would resign at the end of the day Friday. Riso had served as the company's secretary and chief compliance officer since February 2008. Prior to that, he was a senior vice president and chief counsel of the corporate finance group at CIT Group Inc. Care also said that Chief Finance Officer Paul Hughes would replace Riso as chief compliance officer and secretary. Care shares rose 37 cents, or 4.6 percent, to close at $8.42 on Friday.