AGNC Will Report Q1 2009 Results on April 29

Shareholder Call Scheduled for April 30

BETHESDA, Md., April 20 /PRNewswire-FirstCall/ -- American Capital Agency
Corp. (Nasdaq: AGNC) ("AGNC" or the "Company") announced today it will report
first quarter 2009 earnings after market close on April 29, 2009. AGNC
invites shareholders, prospective shareholders and analysts to attend the AGNC
Shareholder Call on April 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)
553-5275 (U.S. domestic) or +1 (612) 332-0725 (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 April 30. In
addition, there will be a phone recording available from 2:00 pmApril 30 until
11:59 pmMay 14. 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 996569.

For further information or questions, please do not hesitate to call our
Investor Relations Department at (301) 968-9300 or send an email to
IR@AGNC.com.

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 $14 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 December 31, 2008.

FORWARD-LOOKING STATEMENTS
This press release contains forward-looking statements. Forward-looking
statements are not guarantees of future performance and are subject to various
factors and uncertainties in predicting future results and conditions.
Forward-looking statements can be identified by the fact that they do not
relate strictly to historical or current facts. They often include words such
as "believe," "expect," "anticipate," "estimate" and "intend" or future or
conditional verbs such as "will," "would," "should," "could" or "may." Certain
factors that could cause actual results to differ materially from expected
results include 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. Persons
considering an investment in the Company should consider the risks and
uncertainties which could cause actual results to differ from those contained
in the forward-looking statements, as well as the investment objectives,
charges and expenses of the Company carefully before investing. Such
information and other information about the Company is available in the
Company's Annual Report on Form 10-K for the year ended December 31, 2008,
filed with the Securities and Exchange Commission ("SEC") on February 17, 2009
and in subsequent periodic reports filed with the SEC. Copies are available on
the SEC's website, www.sec.gov. The Company disclaims any obligation or
undertaking to publicly release any updates or revisions to any
forward-looking statement for any reason, except as otherwise required by law.

CONTACT:
Investors - (301)968-9300

SOURCE American Capital Agency Corp.

Investors of American Capital Agency Corp., +1-301-968-9300