American Capital Agency Corp. (AGNC) is a real estate investment trust (REIT). The Company earns income primarily from investing on a leveraged basis in agency mortgage-backed securities. These investments consist of residential mortgage pass-through securities and collateralized mortgage obligations (CMOs) for which the principal and interest payments are guaranteed by government-sponsored entities, such as the Federal National Mortgage Association (Fannie Mae) and the Federal Home Loan Mortgage Corporation (Freddie Mac), or by a United States Government agency, such as the Government National Mortgage Association (Ginnie Mae) (collectively, GSEs). It may also invest in agency debenture securities issued by Freddie Mac, Fannie Mae or the Federal Home Loan Bank (FHLB). The Company is managed by American Capital AGNC Management, LLC, which is an affiliate of American Capital, Ltd.