Fannie Follower is a term used to describe someone who follows the guidelines set by the Federal National Mortgage Association (Fannie Mae). The acronym MAE stands for Mortgage Asset Exchange, which is a subsidiary of Fannie Mae. MAE provides services to help lenders and investors manage their mortgage portfolios. Fannie Followers are those who adhere to the guidelines set by Fannie Mae in order to ensure that mortgages are managed responsibly.