Ford Motor Co on Thursday made official what investors and analysts had been waiting for – Chief Executive Alan Mulally this summer will pass the baton of leadership to Chief Operating Officer Mark Fields, six months earlier than expected. The 68-year-old Mulally is credited with transforming the No. 2 U.S. automaker from a money-loser to a company that expects to realize a pretax profit of up to $8 billion this year after joining in 2006 from Boeing Co. Ford’s CEO change takes effect on July 1.