ABOUT AMERICAN CAPITAL AGENCY CORP.American Capital Agency Corp. is a real estate investment trust ("REIT") 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. 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. American Capital has $101 billion in assets under management and seven offices in the U.S. and Europe. American Capital and its affiliate, European Capital, will consider investment opportunities from $10 million to $500 million. FORWARD-LOOKING STATEMENTS The press release contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties in predicting future results and conditions. You should not place undue reliance on these estimates because they may prove to be materially inaccurate. The foregoing information and estimates have not been compiled or examined by the Company's independent auditors and they are subject to revision as the Company prepares its financial statements as of and for the quarter ended June 30, 2012, including all disclosures required by accounting principles generally accepted in the United States, or GAAP, and as the Company's auditors conduct their audit of these financial statements. While the Company believes that such information and estimates are based on reasonable assumptions, actual results may vary, and such variations may be material. Factors that could cause the preliminary information and estimates to differ include, but are not limited to: (i) additional adjustments in the calculation of, or application of accounting principles for, the financial results for the quarter ended June 30, 2012, (ii) discovery of new information that impacts valuation methodologies underlying these results, (iii) errors in the assessment of portfolio value, (iv) discovery of new information that impacts the estimate of projected constant prepayment rates, and (v) accounting changes required by GAAP or the Internal Revenue Code. USE OF NON-GAAP FINANCIAL INFORMATION In addition to the estimated results presented in accordance with GAAP, this release includes certain estimated non-GAAP financial information, including estimated net spread income, estimated taxable income and certain financial metrics derived from non-GAAP information, such as estimated undistributed taxable income, which the Company's management uses in its internal analysis of results, and believes may be informative to investors.