Press Release

BETHESDA, Md., Nov. 8, 2011 /PRNewswire via COMTEX/ -- American Capital Agency Corp. (Nasdaq: AGNC) ("AGNC" or the "Company") announced today that it has submitted a comment letter to the Securities and Exchange Commission regarding the SEC's Concept Release concerning interpretive issues related to the Section 3(c)(5)(C) exemption to the Investment Company Act of 1940. The comment letter will be available on AGNC's website at http://www.agnc.com/ and the SEC's website at http://www.sec.gov/.

For further information or questions, please contact Investor Relations at (301) 968-9300 or [email protected].

ABOUT AMERICAN CAPITAL AGENCY CORP.

American Capital Agency Corp. is a real estate investment trust that invests in agency pass-through securities and collateralized mortgage obligations for which the principal and interest payments are guaranteed by a U.S. Government agency or a U.S. Government-sponsored entity. The Company is externally managed and advised by American Capital AGNC Management, LLC, an affiliate of American Capital, Ltd. ("American Capital"). For further information, please refer to http://www.agnc.com/.

ABOUT AMERICAN CAPITAL

American Capital is a publicly traded private equity firm and global asset manager. American Capital, both directly and through its asset management business, originates, underwrites and manages investments in middle market private equity, leveraged finance, real estate and structured products. Founded in 1986, American Capital has $57 billion in assets under management and seven offices in the U.S. and Europe. American Capital and certain of its affiliates will consider investment opportunities from $10 million to $300 million. For further information, please refer to http://www.americancapital.com/.

CONTACT:
Investors - (301) 968-9300

SOURCE: American Capital Agency Corp.