Twitter says co-founder Jack Dorsey to stay CEO

Twitter said Monday that co-founder Jack Dorsey, interim chief executive since July 1, will become CEO of the online messaging service and remain head of payments firm Square. The appointment of Dorsey, 38, who initially ran Twitter, ends the company's plodding search since Dick Costolo stepped down from the top post in mid-June. The return of Dorsey at the reins of Twitter comes as San Francisco-based one-to-many messaging platform, which has not yet turned a profit, has struggled to expand its