Several factors: will AGNC be able to continue the big div. They have bigger P/B and ANH is about to announce it's div. Plenty of time to collect ANH div and still get AGNC. Long time till AGNC pays; alot can happen; it may go lower.
Anworth Mortgage Asset Corporation is in the business of investing mainly in United States agency mortgage-backed securities, or MBS, which are obligations guaranteed by the U.S. government. Its main business objective is to generate net income for distribution to stockholders based upon the spread between the interest income on its mortgage-related assets and the costs of borrowing to finance its acquisition of these assets.
American Capital Agency Corp invests exclusively in single-family residential mortgage pass-through securities and collateralized mortgage obligations on a leveraged basis. These investments consist of agency securities for which principal and interest are guaranteed by government-sponsored entities. The company is externally managed by American Capital Agency Management, LLC, or its Manager. It funds its investments through short-term borrowings structured as repurchase agreements.
Similar, but not the same. Different types of investing and risks/rewards. Hope this answers your question.