Utilize the input text as a context reference, choose the right relationship between 'Fannie Mae' and 'Timothy Mayopoulos' from the options.
Options: legal form, chairperson, location of formation, chief executive officer

Earlier this month, financial disclosures revealed that Fannie Mae CEO Timothy Mayopoulos and Freddie Mac CEO Donald Layton will each earn compensation of about $4 million.
chief executive officer