dorsey-as-its

Twitter Inc named Jack Dorsey as its permanent CEO but said it would look elsewhere for a chairman, seeking to allay concerns about its co-founder's dual role as head of the mobile payments company Square. Twitter's shares rose as much as 6 percent on Monday after the announcement, which ended months of speculation about who would take the top job at the microblogging service. Dorsey has been running Twitter as interim CEO to much acclaim since his predecessor, Dick Costolo, stepped down on July 1