Press Release

Shareholder Call Scheduled for July 30

BETHESDA, Md., July 20 /PRNewswire-FirstCall/ -- American Capital Agency Corp. (Nasdaq: AGNC) ("AGNC" or the "Company") announced today it will report second quarter 2009 earnings after market close on July 29, 2009. AGNC invites shareholders, prospective shareholders and analysts to attend the AGNC Shareholder Call on July 30, 2009 at 11:00 am ET. The shareholder call can be accessed through a live webcast at www.AGNC.com or by dialing (800) 230-1951 (U.S. domestic) or +1 (612) 234-9959 (international). Please advise the operator you are dialing in for the AGNC shareholder call.

An archived audio of the shareholder call combined with the slide presentation will be made available on our website after the call on July 30. In addition, there will be a phone recording available from 2:00 pm ETJuly 30 until 11:59 pm ETAugust 13. If you are interested in hearing the recording of the presentation, please dial (800) 475-6701 (U.S. domestic) or +1 (320) 365-3844 (international). The access code for both domestic and international callers is 107213.

For further information or questions, please do not hesitate to call our Investor Relations Department at (301) 968-9300 or send an email to [email protected].

ABOUT AGNC

AGNC is a REIT formed in 2008 to invest exclusively 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 an affiliate of American Capital, Ltd. For further information, please refer to 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 $11 billion(1) in capital resources under management and ten offices in the U.S., Europe and Asia. For further information, please refer to www.AmericanCapital.com.

(1) As of March 31, 2009.

FORWARD-LOOKING STATEMENTS

This press release contains forward-looking statements. Forward-looking statements are based on estimates, projections, beliefs and assumptions of management of the Company at the time of such statements and are not guarantees of future performance. Forward-looking statements involve risks and uncertainties in predicting future results and conditions. Actual results could differ materially from those projected in these forward-looking statements due to a variety of factors, including, without limitation, changes in interest rates, changes in the yield curve, changes in prepayment rates, the availability and terms of financing, changes in the market value of our assets, general economic conditions, market conditions, conditions in the market for agency securities, and legislative and regulatory changes that could adversely affect the business of the Company. Certain factors that could cause actual results to differ materially from those contained in the forward-looking statements, are included in the Company's periodic reports filed with the Securities and Exchange Commission ("SEC"). Copies are available on the SEC's website, www.sec.gov. The Company disclaims any obligation to update or revise any forward-looking statements based on the occurrence of future events, the receipt or new information, or otherwise.

SOURCE: American Capital Agency Corp.

CONTACT:
Investors, +1-301-968-9300

Web Site:
http://www.AGNC.com